Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d07bebadab0b2c6…

MALICIOUS

PDF

124.4 KB Created: 2021-05-16 00:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f5db2fc7de8c6cf067b6e19b0b16724f SHA-1: e34234d84cc56012a0a3d44875ff42340a8ac5de SHA-256: 4d07bebadab0b2c65e7a2a389992bb8e0b588848fb9516563b660733fc322382
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs, such as 'https://mezovuduw.ru/strik?utm_term=2004+ford+focus+zts+0-60', are likely used to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/strik?utm_term=2004+ford+focus+zts+0-60 PDF link annotation
    • https://cdn.sqhk.co/bulunazi/hdiiLge/lemon_pound_cake_recipe_with_instant_pudding.pdfIn PDF document text
    • http://tipografiyav.moscow/18868178298hpg76.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/8Hjhjic/begozepuji.pdfIn PDF document text
    • https://wokoxulepimam.weebly.com/uploads/1/3/1/4/131438011/rovola.pdfIn PDF document text
    • https://magenudelekoj.weebly.com/uploads/1/3/5/9/135975171/e82214f4b41.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/720625364.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/78908982467.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/speak_english_fluently_book.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/6941365.pdfIn PDF document text
    • http://gromstroy.com/how_to_not_be_an_average_person_can_runb24gq.pdfIn PDF document text
    • https://torejijifixoni.weebly.com/uploads/1/3/5/3/135335296/voguken.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/eMjomie/things_that_go_pew_pew_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunedevare/bUopagt/tanks_ww1_impact_on_warfare.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/panokojol/cell_theory_worksheet_answers.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_249c02ca8617411a8acd5efad631d860.pdf?index=trueIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_e529712515784d38938b705a1f8de7f0.pdf?index=trueIn PDF document text
    • http://kigokigaruv.myartsonline.com/gudonaxom.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_5eca6c9a055a4b34ac473447e14926cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bueno_meaning_answering_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/galegiledomowet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000193a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A9 5276 bytes
SHA-256: 01927ad87088f67ad6af58f913393a58372fd9f4215534a38726ac315f6a183c
font_01_sfnt_off0001a5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C8 12920 bytes
SHA-256: 417d75f9483b0466fb352c9c7e001f593851e2bafde6b966162bcf9f636ee47a
font_02_sfnt_off0001cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF7A 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c