Malicious PDF — malware analysis report

Static analysis result for SHA-256 4720711271c7032a…

MALICIOUS

PDF

86.4 KB Created: 2021-03-18 03:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7074ebd23c9a40a82ae3fe0e546a01b0 SHA-1: e8c86fddd0363e75ca3cf70f318e11ebcda295ff SHA-256: 4720711271c7032a3404abbc87e17078f0581d7b9e25a6039ed2a5098388888e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous external URIs point towards a phishing or content-luring attack pattern.

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://dafemum.ru/strik?utm_term=nvram+reset+hp+printer+p3015 PDF link annotation
    • http://fodepurarag.22web.org/36851306224.pdfIn PDF document text
    • http://poopo.ru/2898098128827f11.pdfIn PDF document text
    • https://famixarusefon.weebly.com/uploads/1/3/4/3/134396739/rovupas.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/8253821.pdfIn PDF document text
    • http://lishop.site/sig_sauer_p938_iwb_leather_holsterqckcn.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/definition_of_goodwill_in_accounting.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/lurujiwipimuge_xomiwoz_gopebizaj.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/93700335865.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/tixedujegibex/96235625610.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/easiest_way_to_see_mt_fuji_from_tokyo.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_934921bad19147ebaabd12acf3d895b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wurivuve/58317660482.pdfIn PDF document text
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_74d9bbe141a643078c9f565f120a7acf.pdf?index=trueIn PDF document text
    • http://vobumubuto.rf.gd/zimorirotitawizezanil.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/83339284504.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_b2562eda34bb4e1ab11adee365abcab9.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_aa7ce970176b41f385795a01ba5d2b21.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C0 5536 bytes
SHA-256: 97369807a864807ad0fffede2839b3e631f98dd90c650777b2a74826e6d9d242
font_01_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 10980 bytes
SHA-256: 731a98febe594356633f222105be25d2638b603c020b0e86238299c08cf0c7a5

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