Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ea46308df2c5e5…

MALICIOUS

PDF

74.7 KB Created: 2021-01-20 01:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9582ce8a4daad5448e3502e7894214b2 SHA-1: 7698d62ef9c47f271e73bbefc16c3e7d540453ed SHA-256: d1ea46308df2c5e527d6b8c756b5ff5e910583c51f8f742f56d73f4481eef32b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs that point to other PDF files, suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of external URIs and a large number of linked PDFs on disposable hosting points towards a phishing or spam campaign.

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://trafffi.ru/123?utm_term=breath+of+bwonsamdi+what+to+do+with+it PDF link annotation
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/womivaburadufo.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/zupedagab.pdfIn PDF document text
    • https://site-1171956.mozfiles.com/files/1171956/romutugub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_5fabfcf44bc76.pdfIn PDF document text
    • https://site-1178201.mozfiles.com/files/1178201/kevawadenixuwawetozese.pdfIn PDF document text
    • https://pisubamu.weebly.com/uploads/1/3/0/7/130740412/6080562.pdfIn PDF document text
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/6593737.pdfIn PDF document text
    • https://site-1174105.mozfiles.com/files/1174105/kanupunanexakuwuwovatife.pdfIn PDF document text
    • https://site-1171749.mozfiles.com/files/1171749/rushcard_corporate_phone_number.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/gozalu.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/f2c6abf96b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fb77654b9580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f89dc18c97bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5fcfa7c727f03.pdfIn PDF document text
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/2876259.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/a0a0d356.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://s3.amazonaws.com/rovuweraja/visororuxifipojinow.pdfIn PDF document text
    • http://roragopijejem.epizy.com/zetoku.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_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 5184 bytes
SHA-256: 8696ccc5d5dae4af35ec7f70dacd0e6f1df93fc6b1bc323a3b14c64b7f81ed06
font_01_sfnt_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 10268 bytes
SHA-256: b343856e4267687f94638460e5f49bfc42b79a4f107fa302004d414d3faf0a54
font_02_sfnt_off00010f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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