Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c93b8ecf317a013…

MALICIOUS

PDF

91.6 KB Created: 2021-07-21 02:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a1e94611a212b581042c549571f76369 SHA-1: 9afb9832a6af525b12efa8f3e77eb7b8dfd71835 SHA-256: 3c93b8ecf317a013e677864651a462eb8bfd0a0d541ce21b1730299513358500
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or IP addresses, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ttccid.com/userfiles/files/74866208811.pdf In PDF document text
    • http://palenice.net/obrazky_clanky/file/795309319.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8731e49d2c---12372899143.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160cab4e9c2e75---46801476026.pdfPDF link annotation
    • http://arch-teh.com/pic/userfile/10462709910.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210613_FA8536C0B4CB0ACD.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/67376331138.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/5647603951.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a83eba61632805111476a3c3ca51fa3e/83431986389.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/vidato.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c998ce04a12---jifomowumawo.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071bee81a3b5---giramebopamifeluz.pdfIn PDF document text
    • https://mashura.co/userfiles/files/kuwidenipowewirerulilekon.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/kilolutopajodabusamuroxe.pdfIn PDF document text
    • http://stevis.cz/files/file/11033211051.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/b36c06f1cc52ea25314cd009ff8c0304/74747036578.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/1h5d09vab1ngrpqm40nll708o7/68294815122.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/96bb20ba58c4f823951e250fa4b20dc9/25653660812.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab178dce83---64412129918.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ag7vi531ai0uapknr81f9shjvp/99966878029.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c188451f10c64d98665b8708f4a07016/jidebijebopes.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c46e5a9d177---153887110.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/47283048295.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/8cfe713d3929d968b9e3c19da998c911/fiwujajalaze.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/3112a2c2enej1rhehonrppn7l1/83528287653.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/65630267306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+put+a+worm+on+a+hook+for+troutPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 17076 bytes
SHA-256: 7749464a03e4c41bf94633d3e8b9c7f7faaf349c0ed44ffe068574a15b400642
font_01_sfnt_off00013144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13144 10452 bytes
SHA-256: f06c51df959bd0155f064ffe32b9fd3fb1ef0c1549f5af3f9efb10694ac276af
font_02_sfnt_off000148c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.