Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae47cb0a69347cc8…

MALICIOUS

PDF

88.9 KB Created: 2021-02-24 01:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9efda0a1e09c9fb478ee1ee0c6f578b9 SHA-1: a7f68fedca24e29d21fb5ce796bccabbfc18ca05 SHA-256: ae47cb0a69347cc82f86723cf3c538bb8b10434b50ea5970f4eb69b74102e043
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered via spearphishing attachment, designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=capitalism+and+schizophrenia+epub PDF link annotation
    • http://invitesistem.ru/avett_brothers_brooklyn_song_lyricsqfq4d.pdfIn PDF document text
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/mazogefotowe.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/wopivijila-fukaladok-xetet.pdfIn PDF document text
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/39532542.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/RgcZ3T3/lanolivepuva.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/ghggfgd/pogotelojiwevig.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/4762653.pdfIn PDF document text
    • https://kijidagidopijub.weebly.com/uploads/1/3/0/7/130776406/8672314.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/kobuxoragurodaduki.pdfIn PDF document text
    • https://xesufomoma.weebly.com/uploads/1/3/1/0/131070197/46a9178b053.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/jFidVeE/64109389761.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/4mE8ugd/82230640292.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/jusoxisarujopugo.pdfIn PDF document text
    • https://duvetuxivana.weebly.com/uploads/1/3/3/9/133999993/kidamekolib_bilufopulexuv.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
    • https://s3.amazonaws.com/benuka/domiwudawitabegu.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_off00010f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 5408 bytes
SHA-256: ecca42d035d71b6f84b6582461f43705891770fa0e43d79e192236b530c0148b
font_01_sfnt_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 11768 bytes
SHA-256: 171110fd86e3d75c1f3f7297b4322f56d623624f2bcf052b7a81e60c4b0c2307
font_02_sfnt_off0001486b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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