Malicious PDF — malware analysis report

Static analysis result for SHA-256 34766bd995a6a5ad…

MALICIOUS

PDF

74.7 KB Created: 2021-09-15 19:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c1b4f3b4656164d66b205bda2893f913 SHA-1: df3eb67f6416ff9c4cc9368a39020caa127800ad SHA-256: 34766bd995a6a5ad91d4fee8bcd59b764cea3f67539e73f30c118bf16ffeceba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=watch+gullak+online PDF link annotation
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3d20d9b71bd223bcefa4b3c4d8259dfa/sajobetobulaxulepukagejuk.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/venijitexutuloruze.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vct09gtbeiqr8jgj5gnisnqeil/42750250688.pdfIn PDF document text
    • http://azizolace.cz/images/file/73753584059.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210909025410.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/venuxutafegemigozajare.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1nuh4gm2ah336vqoaefjeg4tp2/14935555705.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/takilugawowozul.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/41682556014.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/75760691345.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/92176686143.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edfcd4f9fc---kamedazozuguvasujuvise.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338c00426a1---16402783260.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/makesajirasevimuduba.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/4un4v4nqu13h85covki7f3g4k4/zojogefapuniwatir.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/maxuzogawifosiwolifudem.pdfIn PDF document text
    • http://mosjob.ru/images/file/xisawo.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/minotozogopizesunizinulo.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/rakevoguxabudipisovodi.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/rarugubomakuruti.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109031230596171.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/75b929e08b1a0f9f348d6d9ee8203cb8/17746821848.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/19684492321.pdfIn 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://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_off0000c265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7C 10424 bytes
SHA-256: e728d1b2494d23f3ef278118607f5a8dedc3184500dbef7ecc9592cb7361643f
font_02_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 16892 bytes
SHA-256: a5ae14fa4b8ea1eafe412f84d9148c3e73e538f42334f9938b1cc567cf378135

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