Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4eb760b42b1aba…

MALICIOUS

PDF

98.4 KB Created: 2021-06-16 02:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9f21c8a1378bef8a829657d90850d9d3 SHA-1: 89824ecee359e82c37963cf0f5e0b935bb4a1929 SHA-256: 3b4eb760b42b1aba7721cba21de7b6adb2065e3ec47dc196c479dd5f134468e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://catamma.ru/uplcv?utm_term=dheere+dheere+pyar+ko+badhana+hai+unplugged+mp3+download PDF link annotation
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/5d69d93b2a2df71cd63db80226d9e4ab/89360725892.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/25950844945.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/sk6stm8q63unhbqq68u99lg897/ruvad.pdfIn PDF document text
    • http://bptramptour.pl/files/file/ruwenenulojewogujazeteva.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/2f95e535731b1f6b67c15f2093e1b669/suguripaduvuweleponoza.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/843f744de5e89f8c9ac78580f4c26bde/tofijovosewiwodireb.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/28f86de802548e95fda2ad034a79381e/latigunad.pdfIn PDF document text
    • http://goldenpoolandsauna.com/user_img/files/pozosipaw.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0710374bff---jowenulebosozajopizi.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/47b3388e5b05525a477ddd4009581444/kexakakunikawikepuvewof.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f20b8f0997---bosuduwaba.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/af519aa338a89588a7dc22ccf743b0fc/dolokewadofilatagesage.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/voxud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 5556 bytes
SHA-256: 541790b867026e687b2dc631d392ca56dc5ffe2931d612502dfd8285c2559e9d
font_01_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 11288 bytes
SHA-256: 969dc3d5d942f589e2ae4fbc7ab11211251b5674c19798d33c352e3066c73b28
font_02_sfnt_off00014087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14087 16160 bytes
SHA-256: 7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce
font_03_sfnt_off00015582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15582 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_04_sfnt_off00016383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16383 6092 bytes
SHA-256: 50b401137ddb6f70f3d53952feb6333eccd400bc81d0df54d028bb7b7eb64df9

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