Malicious PDF — malware analysis report

Static analysis result for SHA-256 af996ff42f50ca06…

MALICIOUS

PDF

77.5 KB Created: 2021-04-06 12:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 855d6f024f167067c8f4df5aedb33093 SHA-1: 29f556f6dc0013be11d9bcd23aa16308d5af39b4 SHA-256: af996ff42f50ca06abe9e4f4a653a0ead45974a44e226a78c613c3ebd3373bba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the structure of the PDF point towards an attempt to manipulate search engine results or distribute further malicious content.

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.
  • 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://dugedepap.ru/award?keyword=sarl+bodler+cvece+zla+pdf PDF link annotation
    • https://watogovujun.weebly.com/uploads/1/3/4/6/134626060/kawanunizaki_gifemaveju_kalupazo_vejedexipa.pdfIn PDF document text
    • http://uorott.com/bescom_duplicate_electricity_billhztgu.pdfIn PDF document text
    • https://sekoxakukajafal.weebly.com/uploads/1/3/4/7/134705290/dukilenuwugewosewuga.pdfIn PDF document text
    • https://jekewuvewaw.weebly.com/uploads/1/3/1/0/131070420/21d0a090c4cd9d1.pdfIn PDF document text
    • http://alcozerox.com/hollywood_escape_room_level_64s6jxu.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/eCUrji8/59817299221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_605c977eeef54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_60617807b6e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_600e642dc5a7a.pdfIn PDF document text
    • https://sexomimafu.weebly.com/uploads/1/3/4/3/134311134/vatoti_dixiteseka.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/fjjBDgh/36736589063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5ff849dd4299c.pdfIn PDF document text
    • https://xularidamilizal.weebly.com/uploads/1/3/4/6/134685918/7898441.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/kisovefimawu.pdfIn PDF document text
    • http://yandex-delivery.cc/pejedipolerudirepuzakefannht9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420237/normal_6005afd689e87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/321fcca7-5bac-40a3-a2d7-3e8c1bb43faf/14186689710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb1c9d8-08b3-4ae3-8fbd-567fd8538845/3688767849.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_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 5324 bytes
SHA-256: 0ee3503f41b863e5709cf6f1250150fe1d9650f04eefa6d671058cf4ad29d88a
font_01_sfnt_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 11388 bytes
SHA-256: 518dd85f4a4dcff19ce210a38e356b203391038c98a304e22e08cf2905afbdd2

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