Malicious PDF — malware analysis report

Static analysis result for SHA-256 719c389ce7e4954f…

MALICIOUS

PDF

69.1 KB Created: 2020-12-03 07:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e37993e80d2687ec8c1d9826d696b7a2 SHA-1: 9408e42217bacc852b1687383288eb3bac299935 SHA-256: 719c389ce7e4954fd53e2bf1c37c83f15b7222960d917bc9878dda9a3dd0aef2
176 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/123?utm_term=sims+4+how+to+get+angry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5f976c6019bbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f8daed1585d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fbe3275b1b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fabb163024cb.pdfIn PDF document text
    • https://temoxemotedi.weebly.com/uploads/1/3/4/5/134599163/7008857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_5fad91fb74bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_5fbde22c5d23b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f8d81506333e.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/pesukivo_ditukovalowa_zesarupugulem_fuxodidesedokog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f872aa5b427d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f8de3eb4c36b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5168f3de5e49b55aeb32/1606373748220/35011468788.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/44148150798.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/shadowrun_5e_best_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/2020_ford_bronco_release_date_and_price.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBB 5452 bytes
SHA-256: 988d2cc0ea835f06b5ba79cf307ddd03f5c88fc54663d085f747b0787e67b026
font_01_sfnt_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 11068 bytes
SHA-256: 36ffce4b58481bce37c56231099d69f599836a25675a0d969f4876d8517bf594

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