Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ce961e0c9c306e…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 04:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1f1461c8f8d37e38ed017bfdad633f0d SHA-1: 79e5dba03dd24c0c12c1d7d86dc7a31bcd0ace2c SHA-256: 47ce961e0c9c306e900e5efda970b4fadfbb162317cbb1ce8f42689f2b4afd6c
222 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The ML classifier also indicated a high probability of maliciousness. The embedded URLs and the structure suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to lead users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/wix?keyword=shadow+of+mordor+epic+rune+guide In PDF document text
    • https://cdn.sqhk.co/medasozuf/hgQhif5/84402713576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5fd918a9680b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5fee8e5611816.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/WhbmTih/muvefitemarazojopokozeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_6015b9f3e3183.pdfIn PDF document text
    • https://bawobejeburojax.weebly.com/uploads/1/3/1/1/131163695/6735679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_601b286016ab9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504788/normal_5fca36914420c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_601247e612aad.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/6824307d44e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_6030d7a1d40b6.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/9giKIFs/dragon_wallpaper_4k_phone.pdfIn PDF document text
    • http://difavusimope.iblogger.org/chernobyl_hbo_full_episode.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://katanitape.rf.gd/fuxitesowetaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 5356 bytes
SHA-256: a8225e965f02f1117f829752fbddc1dcde7d377ad3a0d10afc6d2872ae823d12
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 10324 bytes
SHA-256: b59bb2d4113d918cd8666c4d8f877be8e713ca233b546455e28758fbeb7c5f15
font_02_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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