Malicious PDF — malware analysis report

Static analysis result for SHA-256 011519dae4578ff5…

MALICIOUS

PDF

73.4 KB Created: 2021-05-31 09:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc7af2ef2de6bae2f9cf06ab5f0f4dc8 SHA-1: 91016254086d75925c3b8296882185c57175d352 SHA-256: 011519dae4578ff5be0de9a9dae556244f1103dcb5233f5d8b86beb2df7852a7
186 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=free+editable+handwriting+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4394082/normal_5ffb9051c9543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_605001e681362.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/03e5d6ef0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_6041c43321aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_6030e442434af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_605db37538f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500883/normal_601d4d52a51f6.pdfIn PDF document text
    • https://pupiwikupexi.weebly.com/uploads/1/3/4/3/134348736/9d39c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fcda46759d4c.pdfIn PDF document text
    • https://sixevajerav.weebly.com/uploads/1/3/5/3/135341720/100be0760be0bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fd1406acd7db.pdfIn PDF document text
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/gotosuku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5fde2348196e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_606d38a33ba2c.pdfIn PDF document text
    • https://xujixokotejol.weebly.com/uploads/1/3/5/3/135308581/8945789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_604107daef3f0.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/8152675f-1735-43c2-b96d-d9d187a9e287/a_mothers_reckoning_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b781f7-5269-44bd-a473-83ab51a15374/function_of_language_proposed_by_halliday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b53d563-685c-4178-9713-4436d1809ced/battle_of_valmy_youtube.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 5340 bytes
SHA-256: 53c7d2701dc5852fd81bdb1eb35ed49dfbd9ab631a16fbb3ef9842e4c0f02c10
font_01_sfnt_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 10840 bytes
SHA-256: 42650ab78d1f13085486466b840a44fef0dc7133e57642e372b3dd75f8ec8e38

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