Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbadde27e2fe956…

MALICIOUS

PDF

74.9 KB Created: 2021-02-08 08:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0688bdba1a41fb38740e542b9d9bbd9f SHA-1: 3737adfc61a5778085a38d175b7db828674e3768 SHA-256: 1fbadde27e2fe9560f2190854f81e9bdd25f7870572c670a1299e1418c14fb28
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous external URLs hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Cartagena map pdf'. No scripts were extracted, but the presence of a link farm and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/wb?keyword=cartagena%20map%20pdf PDF link annotation
    • https://vaxidavuk.weebly.com/uploads/1/3/4/3/134371973/lotud_domufez_nugoguga_dodilezusolo.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/6445904.pdfIn PDF document text
    • https://vewemojuwu.weebly.com/uploads/1/3/5/3/135392654/bivipikerawo.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/7294038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fdc9997e3c5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5fe940d980bf0.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/999bb50e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368999/normal_5ff88bd4581a7.pdfIn PDF document text
    • http://wusejopajaxus.22web.org/42564319576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5ff920849975f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_600d2663143e3.pdfIn PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/vewivemususanuw.pdfIn PDF document text
    • https://butabefuje.weebly.com/uploads/1/3/1/4/131437434/d1040ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_5ff385e2df24f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetowotupime.rf.gd/xikotibedanirexewimig.pdfIn PDF document text
    • http://getewubajup.epizy.com/18213568175.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/63719027358.pdfIn PDF document text
    • http://pojasiw.rf.gd/macos_app_store_stuck.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_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 5056 bytes
SHA-256: 63d792edf76fa73e898062567ace20ab633ba7decc5ce33882eb98ce4ba8ef93
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10756 bytes
SHA-256: e540f7538d27a01dcb0b74fd91af162307a3fc754a89fb6281d354d0f8597ae9

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