Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3e2e11aaba3fed…

MALICIOUS

PDF

91.0 KB Created: 2021-06-04 14:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 04d7969fde032d0a3d74317e275c4817 SHA-1: 9e32878d89dac09ea59959c58050c92433a21269 SHA-256: 0e3e2e11aaba3fed4ae66f28c8c00debdc0a8a039878bbcfa5c2c19fadf41f82
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://medvor.ru/pbw?utm_term=chain+link+fence+installation+price+guide PDF link annotation
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/c971b6f67.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/4752410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489981/normal_5fed1dbf8ebf3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381541/normal_60b19bc254a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_605a383771fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_601b00ba9d7ed.pdfIn PDF document text
    • https://zememaxuzibur.weebly.com/uploads/1/3/5/3/135326459/tekanefigo.pdfIn PDF document text
    • https://jimepozuzaz.weebly.com/uploads/1/3/5/3/135350414/d79902301671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425506/normal_5ff034002f918.pdfIn PDF document text
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/b822c7.pdfIn PDF document text
    • https://xurajozut.weebly.com/uploads/1/3/4/3/134371968/pegebo.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4421615/normal_60b631763e816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489411/normal_6056dce598585.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/bupow_fasubo_boxewonaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_6018d8de04fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_6044956f5938b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_606c9cfb7bb57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/007fc30b-68da-4b29-af1f-86cf1dc32c1d/recoleccion_de_datos_cuantitativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4848e9-7a36-48a8-af1c-1d725622e6b3/which_of_the_following_may_appear_on_a_flexible_budget_performance_report_quizlet.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/62394543934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a239986a-ffb3-400b-a558-5b90b558272d/python_3_dictionary_get_first_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca57674-a0cf-4cd3-b563-e935152f46f3/71287451128.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/lobenan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb167605-be5c-4c86-a531-163524104e37/zesidigisurilerumapesiwa.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_off000126b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B9 5388 bytes
SHA-256: a74665ea74b5adea712b538b2279526d89c9311a85f6d1c79b8c5f14a5bd2bde
font_01_sfnt_off00013905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13905 10984 bytes
SHA-256: 78c3f5870990db9bbb616702381714a4745219650223b0689d18db5f8370ceef

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