Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fe0987d0049f30…

MALICIOUS

PDF

82.6 KB Created: 2021-02-23 04:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 487b4335f3b6da56e970a9fb01cf604b SHA-1: 564b353ca9a452f41e129336a88f9c544ad746ee SHA-256: 54fe0987d0049f30da980cdacefbd98a45cb74f6ca86fb5d3d3a5783e9231dba
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links pointing to other PDF files hosted on various domains, many of which appear to be disposable. This behavior is characteristic of SEO link farms or phishing campaigns designed to distribute malicious content or manipulate search engine rankings. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://leonvi.ru/wix?keyword=anglo+saxon+villages PDF link annotation
    • https://vepovadubit.weebly.com/uploads/1/3/2/6/132696500/bulewo.pdfIn PDF document text
    • http://onlajn-kassa.ru/86741739076ai40v.pdfIn PDF document text
    • http://remastacer.com/67665519853mwmpr.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/purakedija_tatiwekuni_fixum_pumurowinaka.pdfIn PDF document text
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/tufegowizomaked.pdfIn PDF document text
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/vipowigitosodusebap.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/goxururadena-dimovukawedem-rovezasudebifo-vajiz.pdfIn PDF document text
    • http://goodsfor.life/85439774247r98z9.pdfIn PDF document text
    • https://nozezekotelipub.weebly.com/uploads/1/3/4/8/134883262/tetomu.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/wagezogepukizibire.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/303412.pdfIn PDF document text
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/zidofedibazuf-bobirow.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/wovisixukemu_wutanavajuxos_pijadizebolowof.pdfIn PDF document text
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/vafog.pdfIn PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/vupirulogukirino.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/37dc55c8d6b3c83.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/sorokavegasuk-gekoxin.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/5100491b6f6c.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/2191944.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/veberesarodiri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 4876 bytes
SHA-256: 91be4d1e366a31d38b65633fae9f2a1a69fca90610f09bbc9232fac8de6d9a90
font_01_sfnt_off00011a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4E 10064 bytes
SHA-256: 1c0a2dfcd58b0a60d0082f5906776433f1a78e242d6f425ff9299ed3982bc9c8

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