Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45082cbe5ae91ab…

MALICIOUS

PDF

69.5 KB Created: 2021-03-16 21:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ab351fe4d2d18c8e33fd77c7976981be SHA-1: 084ad3baa052a55f4032389b14dc89788fc9f2a0 SHA-256: e45082cbe5ae91ab5d9414f10309037dd646c55bfeb80fa21043ed6da2bcad0a
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external websites, with one prominent URL suggesting a lure for cracked software. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=spotify+cracked+apk+android+7.0 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415300/normal_604aef940b429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_6050e1d62b740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485710/normal_5fee910d3f779.pdfIn PDF document text
    • https://cdn.sqhk.co/filajokajemu/Ckn1Aja/android_chronometer_set_format.pdfIn PDF document text
    • https://cdn.sqhk.co/bafaluminowi/ieBgeja/best_satisfying_slime_videos_in_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/BigImx7/troll_face_quest_silly_test_level_20.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/YhijfXu/fizakipajubor.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/LDghoig/pulse_ox_levels_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/7hhtia9/vatose.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/iidgiGE/color_mood_circle_stickers.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
    • https://9d03b195-5c34-4993-8a23-519dd2bddccd.filesusr.com/ugd/9ac058_a40099fd21be42e5b99ef3e118668a43.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_2e0416131be143a4a896bf9f9beb04e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6a562a-26b8-43ff-8f63-e584c459a6f2/mouse_guard_glue_traps_reviews.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_aa3064b5ef1049e48a9055c1a7f5424c.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_c11620d8476140ba8ade323b0d498e21.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_790c5704416b45069becc0d13f4563f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e777cc4-d20f-4191-a38d-23a39ec5cbf7/roboruvifapijirodokofidi.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_72d6401007c34fa9a0712f15970c1b5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebc4d53-7a3f-41d6-9d20-302771d96afe/how_to_replace_hp_pavilion_keyboard.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_2a4b2c01678b479bacbbfab6ef44bac0.pdf?index=trueIn 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_off0000c768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC768 5248 bytes
SHA-256: 55406133b14f8244f308fa58543ef0fa1e1dfa272ea7f3ae16e69874ff3929c3
font_01_sfnt_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 9540 bytes
SHA-256: 0943d7f6519ee713f245387af739cca24ed37255b60b0d3526e43b59bd5200ba
font_02_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361