Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d719c6e3579a71e…

MALICIOUS

PDF

67.1 KB Created: 2021-02-08 11:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ae3ccb62ef66c89e252ca9228376a00d SHA-1: 63c34ba0db0bb96228840629432e4a41354d3932 SHA-256: 4d719c6e3579a71e7d0f3e93efce8059519ceea148b2ac3bc5dce512bf40a747
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be related to legal templates, which is a common lure for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points towards an attempt to redirect the user to 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://baarspo.ru/wb?keyword=motion%20for%20continuance%20template%20florida PDF link annotation
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/juwubutolozifod_nutut_pevovidepulun_jurivevorinapen.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/cEfjggc/sonny_bono_net_worth_at_death.pdfIn PDF document text
    • https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/9586386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5fddded4adc95.pdfIn PDF document text
    • http://copyrightsupporteds.com/madutalipimekubodipedizze2ug.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/fjb4yia/pisulizad.pdfIn PDF document text
    • http://logmeinnow.xyz/baldor_algebrabp137.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/ljeie05/facts_school_website.pdfIn PDF document text
    • https://cdn.sqhk.co/rojawamusula/aMjbUY7/xotewafiluvapebulidonidej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446038/normal_600b948aea015.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/6022583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_6016d24769aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_60162745a41fc.pdfIn PDF document text
    • http://bigops.fun/cinematography_for_directors24f9c.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/geSTTk4/bojikabanudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_601029a8b9109.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_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 5128 bytes
SHA-256: 1af0e04f8fc9cbbb6f73f3e82e9dc92878193137ea9483ee27300e4b5fe2cde2
font_01_sfnt_off0000d9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CF 11044 bytes
SHA-256: fa90b92aa18fa5e00c4e151c8891182c570e6a9bfaa5fa30cbf9eef8724c6a73

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