Malicious PDF — malware analysis report

Static analysis result for SHA-256 d482b49a18eb3275…

MALICIOUS

PDF

64.9 KB Created: 2021-03-13 23:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a4125d41d3c4872f8d7bb12228fed4ac SHA-1: ddd821e1983d162e31f13d703dbcc3d8364b8df6 SHA-256: d482b49a18eb3275f430204ccb00aebde66f2dfbfea50dd132dc9316bd35ea04
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 external URLs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=bedford+nh+sau+calendar PDF link annotation
    • http://xofitazuregokud.mywebcommunity.org/jimuserodev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_603dca4334feb.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/what_the_bible_says_about_your_comfort.pdfIn PDF document text
    • http://punejew.mygamesonline.org/physics_list_of_definitions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5fe32ffdd0920.pdfIn PDF document text
    • https://cdn.sqhk.co/gefizorabubi/amLc6je/cubes_blast_match_block_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/jaRaLjc/27861192820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_602f6e8e9d3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_60232ebe121c6.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/PTgdue3/lebimiluravagoxixif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485296/normal_5fe529cd89a31.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/what_are_some_examples_of_conflicts_of_interest_in_healthcare.pdfIn PDF document text
    • https://cdn.sqhk.co/gavoduse/hfovcje/54771334539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_603c86a825051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivozupulakirad.epizy.com/hp_probook_6570b_i3_review.pdfIn PDF document text
    • http://gagutaxu.rf.gd/is_netflix_ending_in_2020.pdfIn PDF document text
    • http://lulasiwafa.rf.gd/gawunabexufelugar.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_off0000c353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC353 5160 bytes
SHA-256: 54ebcc9b85c877785dab617829c662b73e5b73df477532eb9072f046c365e7af
font_01_sfnt_off0000d4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D9 9828 bytes
SHA-256: a853b73b3390f0f91840ec48174eac83fa067ea7d9032497fcc25fff6c0f71c7

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