Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d172d4347a7dcc…

MALICIOUS

PDF

68.0 KB Created: 2021-05-27 23:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1fa098e6446b3c91edbf137f0ded560 SHA-1: eb610ffb204548033950e0bc595fd1ab56dfaecd SHA-256: b3d172d4347a7dcc12a42f5420e59a9cdd872f0d0ae3d2c55c7387baf096a4b6
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 0.9992

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 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://seumenha.ru/123?utm_term=security+flyer+templates+vector PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477649/normal_605b4c3e6db4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463002/normal_5fefb4a7e0e5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_6005803b62358.pdfIn PDF document text
    • https://nerevojad.weebly.com/uploads/1/3/4/8/134850970/xadipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_601ed4e8cec2c.pdfIn PDF document text
    • https://rofubedojatedo.weebly.com/uploads/1/3/4/5/134586725/0f68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_60315efb74753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_6034f58d05e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_5fd184d29cc52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5ff1f5cbd1f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_60481b60eef34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_6012dd944fe87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_606bbbdd1f464.pdfIn PDF document text
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/04f91dfea56845d.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/gudawemavubiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_601d5a2355978.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/b3b2ff9c-bd04-4cdd-a56b-2e19f3ef8cdc/technicolor_router_default_login_tc8305c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d860a508-a363-4f58-9da4-1a8c93b24c4c/bogakeperi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b69858-7563-4c3b-93b5-ff54d9b87df6/onn_universal_remote_codes_for_sanyo_blu_ray_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3b89df-07e8-497a-8196-4ac685913f6d/list_of_high_fodmaps_foods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b825acf3-c4da-4c62-9881-52b2a99139f5/67847128733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58d688c-a7ef-4deb-9fbd-85e0826f66c4/vimilevunije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ad301e-e206-4f83-93b2-7de5b30e8524/74378406046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461706af-c4a4-480f-87ca-1e11c5fc32ed/31512010295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b3ee92-2535-40a1-a19f-0740ff27551d/nobuxoravuxubiguso.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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 5428 bytes
SHA-256: da03fc0e589ff4aa597643e102cf6c9dda0f61137c7ed44496e4f2dcb283738a
font_01_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 9608 bytes
SHA-256: 2930db6527542655eb3ecf1c3b074cf1fc516c051946481671b959175e46f0fa

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