Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fcd69120a632aa…

MALICIOUS

PDF

77.5 KB Created: 2021-03-04 08:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2f5b2e6e2a4eb654c906766ba3158a98 SHA-1: 8b14a0749d47b02eec3331f898340767dcfe8773 SHA-256: 65fcd69120a632aab65ed5baf0490c092c7dc546950029f61e5c725ab636f1b8
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs further supports the attack pattern of directing users to potentially harmful external sites.

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 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://crophysi.ru/strik?utm_term=white+christmas+tree+origin PDF link annotation
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/lofugiziximas_xirelurorose_tobaleb_titomowonaj.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/70015622784.pdfIn PDF document text
    • http://prizinsta.online/hoop_guru_swish_365qvqfl.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/91403184123.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/xabewomiz.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/xelofupugo.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/let_us_create_man_in_our_image_meaning.pdfIn PDF document text
    • http://foodguideblog.com/goniztgj62.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/iYifqVH/61435339185.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/cWfgcjd/classroom_management_techniques_for_preschool.pdfIn PDF document text
    • http://lnstagramsupportlives.com/exempel_p_allelopatirz8b3.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/jeep_tj_ls_swap_manual_transmission.pdfIn PDF document text
    • http://pl50off.info/negogugewipipafomiwiveloc3s7u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketabigumowun.atwebpages.com/last_of_the_mohicans_music_promontory.pdfIn PDF document text
    • http://womawujun.atwebpages.com/masterbuilt_electric_smoker_boneless_turkey_breast_recipes.pdfIn PDF document text
    • http://tegofiv.epizy.com/xakomuta.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_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5192 bytes
SHA-256: 02a64831ba1f91ee9f94db1a58d27791a11bb3abd2939fe9b92062d4a4aa9972
font_01_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 11892 bytes
SHA-256: 8fd3316bf49ed5fd335c7808add1fa692507add174a6b46c0e01d5d3604014d5

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