Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24354051d8233d7…

MALICIOUS

PDF

75.9 KB Created: 2021-02-24 21:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 85fbd0b75927f272e9e6cf26a7176524 SHA-1: 0e464a2077c48de27536d01b8d9388688545b777 SHA-256: f24354051d8233d7e73fd3a4596312e10ea220757ed2d04b1b207c80a022740f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious 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://druttle.ru/strik?utm_term=tracfone+galaxy+j7+sky+pro+specs PDF link annotation
    • https://cdn.sqhk.co/suxujaba/hjhfhhL/pokemon_fire_red_cheats_codebreaker_john_gba_lite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_600eafb2a0b56.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/j951eTC/racing_gears_advance_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/icPyjap/56091081279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_600363cbee1a9.pdfIn PDF document text
    • http://hh666o.site/58132803979d3g8l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416327/normal_5fcf2779110df.pdfIn PDF document text
    • http://leledup.mypressonline.com/is_wendys_breakfast_sausage_pork_or_beef.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/zimubud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_602776ed9c429.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/wisdom_of_solomon_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5fe0d8164acc0.pdfIn PDF document text
    • http://argo-tourism.com/cpm_algebra_1_chapter_11_homework_answers5n0rh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xurixado/letters_of_resignation_templates.pdfIn PDF document text
    • http://nivajunupoz.epizy.com/craftsman_16_38cc_chainsaw_parts.pdfIn PDF document text
    • http://deroselewem.epizy.com/27422331576.pdfIn PDF document text
    • http://vogojitipam.epizy.com/calcaneus_spur_adalah.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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5520 bytes
SHA-256: 2ef8985eaa2f380411f0a6e26a2e4b802638be1d3d226ba3a6a30c35771ab5fb
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10836 bytes
SHA-256: 9a1fc7378a9618f97a3985522b217ccac544c86a4478665f3205180e6e231b3d

Open this report in the interactive analyzer, or submit your own file for analysis.