Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03e10d6bb37df4a…

MALICIOUS

PDF

88.7 KB Created: 2021-01-25 08:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b88a3f03e76d21c0c6e29a52dc3a1d06 SHA-1: f13cc0246f68772426c072788f954270a1cd9ad5 SHA-256: a03e10d6bb37df4aca982570e91947bcef29fe2f3058435f65e78883f6c9bf39
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=electron+configuration+chart+of+all+elements PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370057/normal_5fe0745683393.pdfIn PDF document text
    • http://lady-bug.club/6420952197n5b7c.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/9720349.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/8597458.pdfIn PDF document text
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/jazimin.pdfIn PDF document text
    • https://cdn.sqhk.co/filovosa/eJiiB14/comic_world_dubuque.pdfIn PDF document text
    • http://coins24h.com/26438375750slyh0.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/jVW9hgY/archery_store_kingman_az.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fd2dae20f7b6.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jvWOgch/my_growing_baby_alive.pdfIn PDF document text
    • https://wejapunikiver.weebly.com/uploads/1/3/4/2/134266614/konoru-divuxuwufimiwo-zigozoxeridofod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385613/normal_5feb22bad25e9.pdfIn PDF document text
    • https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/6877671.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/sogupidiwija_jubamefa.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/feajgls/79737476461.pdfIn PDF document text
    • http://telemprom.xyz/mopetovapijigogprbnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_6009d6a0e21b4.pdfIn PDF document text
    • http://nonretloli.site/65385818048ysh8o.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/doriwozerapez-revuxido.pdfIn PDF document text
    • https://fesifikigit.weebly.com/uploads/1/3/5/3/135319823/zadul-gepunuko.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
    • http://gofosuxubajo.epizy.com/bewogufajejovuju.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_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 5136 bytes
SHA-256: fd5bc89a9cb4166d77836d7320c657843b16e245153b1c9f4eb56b35625667df
font_01_sfnt_off00012059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12059 11360 bytes
SHA-256: 7386b4f053df1cea60a05ee900974f3ddab8d4e15471fe98ec4c1bc0c297e7c7
font_02_sfnt_off000146c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333