Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2be574bea72b4c2…

MALICIOUS

PDF

86.4 KB Created: 2021-04-05 02:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 87ca035592d4dcfea095f758ea66fbd7 SHA-1: 958abc19cdd0191f887320fe11be9f0108da2b99 SHA-256: d2be574bea72b4c28ffaa73071a66b301fceae4d3f7d8c277e5cb18a827f8e52
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a URL with a 'utm_term' parameter suggests a potential phishing or malicious redirection attempt. ClamAV detection and ML classification further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/aws?utm_term=what+is+the+police+brutality PDF link annotation
    • https://cdn.sqhk.co/zuzikewed/aLhe0gd/dragon_warrior_3_nes_classes.pdfIn PDF document text
    • https://burojupudigi.weebly.com/uploads/1/3/5/9/135990051/bazizatebebonos_kinosi.pdfIn PDF document text
    • https://wuvipovuzodex.weebly.com/uploads/1/3/4/8/134846945/xuwopumidaju.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/RJojjid/49572218362.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/iehcF10/fill_in_3d_apple_maps.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/erol0hg/vudolaturapijepusun.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/l3ge9qF/mermaid_wallpaper_for_your_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/hitiaGd/tujozetaporadutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_85a5ec3695484ad28f94b9cab1831084.pdf?index=trueIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_5590a949df92456eb42f6cbc6b1bf05c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/the_lord_of_the_rings_the_fellowship_of_the_ring_extended_edition_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/25256955437.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_cbaaa948560e4a3b9a1ae6a7df636f3e.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_e74f8b4cd161478e83aa354852dc2cc4.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_af5c778cea454e10851f26aca96cfea0.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_00b305fd04ba4aeabd947039193fb719.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/white_wash_look_vinyl_flooring.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_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 5276 bytes
SHA-256: 3d59a95bdd072d40f357724230015360748ce145c575839e13e90154419370be
font_01_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 11528 bytes
SHA-256: b12305530c87413eb3b8af8112b3b37721f968c46e5b054700c40ecda3e8817d

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