Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edb636bf959e3d5…

MALICIOUS

PDF

91.3 KB Created: 2021-03-29 06:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb51b3b8355783709fe215260ee1d79b SHA-1: 2a49ba91ca5476f353c6dc46c48c8ac2d9207d12 SHA-256: 5edb636bf959e3d52efa7b2218b3d06fd653dc692fdb1b95585960d47e1c0680
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to educational materials, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/award?keyword=campbell+biology+10th+edition+online+textbook+pdf PDF link annotation
    • http://sevezor.scienceontheweb.net/64301948537.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/madalodukuluj.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/auswyid/dip_nail_designs_for_summer_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6013655448026.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/bCjdIhh/rirasabofes.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/zufakatasefore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_603ff61e6c4b0.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/jujevoj_kerolutuzujub_jakus_kudutifoxog.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/37271616729.pdfIn PDF document text
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/kobugo-xegobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_6026a8c6cb4f8.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/phgiai8/red_robin_bird_costume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367674/normal_5fe445baeceb4.pdfIn PDF document text
    • https://cdn.sqhk.co/sivunukiwe/dGBoiji/27660178056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_600c2764855dd.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://keximidurowu.rf.gd/romans_commentary_easy_english.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/72160888999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3bcd569-d54d-452d-9498-f3f0682b979c/19204443407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542451af-cb19-461e-b27a-575b97232fc0/top_business_analytics_masters_programs_in_usa.pdfIn PDF document text
    • http://wiwifiladovov.epizy.com/pojesilimawif.pdfIn PDF document text
    • http://sofiveza.rf.gd/xubegifogojafizuxerevaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98cf4c43-ceb0-4739-87f5-0be6c8c4f5b2/what_food_makes_you_put_on_weight.pdfIn PDF document text
    • http://zopefunexot.epizy.com/dungeons_and_dragons_online_beginners_guide.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_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 5560 bytes
SHA-256: 1a68ac0cef905556d7f5e19455a540ebbd4561467b6b773a17943d35f1627758
font_01_sfnt_off000129c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C7 11692 bytes
SHA-256: abb24dec6b9a75c2f6d712311756b06bbae133ec84d002a834df57c96ba1f721
font_02_sfnt_off00015134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15134 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378