Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfc9b8af9b6e0ac…

MALICIOUS

PDF

69.8 KB Created: 2020-12-23 17:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8cf1ac045fadcf779b8c50964346808f SHA-1: e8247af72a95084bc3573f93d78954588ea616c0 SHA-256: 9bfc9b8af9b6e0ac6dbb254097afabb60171cb97ecf409f4ea57c46cfa1f444d
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for "lucky phone deals" and embeds multiple links, one of which points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into downloading a payload.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=lucky+phone+deals In PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fdcce3ec00ae.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/figDjij/instant_war_ultimate_warfare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fe0c998e558c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f875c0ae8289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f98131831d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f9a151c2c7b1.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zujobis-bogutuxufat-zepajawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5faf16b67b27e.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/1712917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fac52355b0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8c0874b4a74.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/Dyjc0sW/army_prt_admit_card_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_5fb551ea739bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5fc2cb01d8b8c.pdfIn PDF document text
    • https://kenibuxe.weebly.com/uploads/1/3/4/6/134688639/1e7371985.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/buxoparadazegu/wipoduregare.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_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 5172 bytes
SHA-256: 01be76eeec793c573f0b2f674e21e38472c2eed50ffcb5374cb463584d7a7655
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 11032 bytes
SHA-256: 8675549554462f8f38a12837db8b030a7d902f38dadfa7f1af124f237e2efbec

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