Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d45a5d92b88ed14…

MALICIOUS

PDF

73.4 KB Created: 2021-02-02 16:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ccec755fb3882198cb2d686b31c3f404 SHA-1: 2d079672f01a5488ba5630f62f1723e8436e2ec0 SHA-256: 7d45a5d92b88ed14f177f5f4545d5ec36cff49e0870ec3a253c9b871aedddccb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 phishing operation. The embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful 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://maypoin.ru/aws?utm_term=incorporated+by+reference+guidelines PDF link annotation
    • https://kuvitoguke.weebly.com/uploads/1/3/0/8/130813837/4000346.pdfIn PDF document text
    • https://buxudirikebipur.weebly.com/uploads/1/3/1/1/131164004/fexajanotuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_60133497b9066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5fe9ab6bccb3e.pdfIn PDF document text
    • http://3gusevshop.website/battle_creek_michigan_police_shootingz3z5z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5ffdbd7a59f97.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/zinekafo.pdfIn PDF document text
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/gurepirobobaraxad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384640/normal_5fefec532ec6f.pdfIn PDF document text
    • https://moraraxewurazi.weebly.com/uploads/1/3/4/0/134042425/zujid-wogidajigid-timepidivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_600fcdc35aa74.pdfIn PDF document text
    • https://bikepudebap.weebly.com/uploads/1/3/1/4/131405977/3431555.pdfIn PDF document text
    • http://romeoplanet.club/670621378682hcpi.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/bozulobi.pdfIn PDF document text
    • http://ctuxuu.com/hyperdimension_neptunia_episode_10ezdp.pdfIn PDF document text
    • http://vsedlyatebya.xyz/materiales_aislantes_electricosh21di.pdfIn PDF document text
    • http://huaweistoreukr.xyz/poveseridarifolujokilajtyg6p.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/benubapopikaj/best_offline_rpg_android_2019.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_off0000e210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 5500 bytes
SHA-256: 9337b9b119af23bc516322c4bfcec02eafab64dc1a3fba5b26ee51c5e54be7df
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 10500 bytes
SHA-256: 87c86b1b05e24fb343eabf2a1ab7b49c158f93563d676a346d3587c34f5dfb1e

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