Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e5e9c8b681a86d…

MALICIOUS

PDF

80.8 KB Created: 2021-05-27 18:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd450893eab3f385d558f2ada0b73332 SHA-1: 108c9ea50e34b7dc4c627d401efa43d8148c6f03 SHA-256: d6e5e9c8b681a86d85dc41fa27425dbaefcf7a8db54ae19f0d8e1c70fc588d8d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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 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.
  • 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://midufefew.ru/strik?utm_term=salary+slip+format+in+word+malaysia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5fcca1a5bb640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_6054b805c05d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_601e02c754141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_6033aebb88361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_5fd179e755dfe.pdfIn PDF document text
    • https://lefitujeledezov.weebly.com/uploads/1/3/6/0/136028835/9046959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_603c3a0f4a76c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5feebf3996529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_60530e50103fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcff66b5f053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe420a13768a.pdfIn PDF document text
    • https://vefubonipit.weebly.com/uploads/1/3/4/7/134719522/86f24f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_6025591744b35.pdfIn PDF document text
    • https://fanuwatesovize.weebly.com/uploads/1/3/1/3/131380837/lotetupafoz-juvixaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5fe1ccd24cafc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/147a4438-4f11-446f-a3c5-8f9f4d21be35/how_to_replace_battery_in_genie_garage_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0551b0-e23d-4e24-8720-405dce51676b/rupufavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0b7870-88df-43b8-9c24-029e930040ee/lalupasin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0c0e42-4305-48f7-b64c-6e009ed8669c/nike_jogging_pants_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6be540-d953-47a7-9796-62ea3b4a6f57/wenogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a210c2-7cba-4bcb-82a8-59d595d40034/73191180537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da80fd2-bbee-4e2c-bd1b-d6397fa2176b/why_is_nikki_giovanni_important.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5152 bytes
SHA-256: c6454521b5acfc964acdd49459df4d297ef7e211b826d3dd871f9d89298bfc0c
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 10384 bytes
SHA-256: 90bbae410f6a4c8893734b15f17a1dbc4057f496f0e4619a29d44f4e8eb9e515
font_02_sfnt_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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