Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c7597fa3e31bc2…

MALICIOUS

PDF

64.1 KB Created: 2020-11-16 17:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 279fe4a58d10e6ceab3b9bde6384d4e4 SHA-1: 1da5601322e5ba4255c0dcce07514bc5161ba885 SHA-256: a7c7597fa3e31bc2af1aa06827f082d95b1a23596c4d7e04befd76a0efb85d7f
234 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious infrastructure, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=hr+limited+brands+etm In PDF document text
    • https://munuvatatopa.weebly.com/uploads/1/3/4/6/134686277/301b1da88.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/f15cfa599048c6.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/wafoxofalotulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_5f9cf26ca22b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f9436f4dca9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/22199016657.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/45479485061.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/this_sign_cant_stop_me_i_cant_read.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/peltor_comtac_iii_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/bipimunetabezaren.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/honeywell_vista_10p_user_manual.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_off0000bfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDF 5072 bytes
SHA-256: 5cb1350ff2de37549647579b1de9c8509530cba833c11c379e3c21c19dd5972c
font_01_sfnt_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 10328 bytes
SHA-256: eaf7ac0a1a485e2388c6f7b081c76e6779bcd615b2e0eca14c5c859f7c35dd7c

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