Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d773ad9e98758…

MALICIOUS

PDF

74.7 KB Created: 2020-11-14 01:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5c97c285444bd2bb7a0ff42f1f123b39 SHA-1: d924e61435bd672b5d0c8bec9abfabe2d9e2dad6 SHA-256: 1a1d773ad9e98758b4c733b441035f977b22183493e45bdd3fbf8e48b3eded69
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 0.9998

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://trafffi.ru/strik?utm_term=carta+responsiva+venta+de+vehiculo PDF link annotation
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/6744010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fad865c3289c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f88679ad4dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5f9f0bea05842.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/lelolipef-zizito-zazigenuwim-buwekunikukel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87621c86ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5faa8d017c2f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5fae114435e24.pdfIn PDF document text
    • https://ribuborufexegax.weebly.com/uploads/1/3/4/5/134507127/kezakav.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.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/4c4d41ca-019a-43be-be52-85f354c64a7a/chat_de_videntes.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/32297053197.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/bernardo_ohiggins_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/hoover_windtunnel_u6446-900_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6157d8ce-c806-4a8d-975c-47570bf0e46d/68930563628.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/lirudubikizonexo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 5128 bytes
SHA-256: 52c54a14d6f471aff7b3b52d7ef35a909668a9a94d42e34a83f2c8b27343e0f8
font_01_sfnt_off0000e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE665 12616 bytes
SHA-256: ab843d54e6e2045416c0a49f1f88a0ba5a312d1d79a9855a1459df77665deb4b
font_02_sfnt_off00010fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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