Malicious PDF — malware analysis report

Static analysis result for SHA-256 2192cd5e86123314…

MALICIOUS

PDF

76.3 KB Created: 2021-04-06 20:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 863b5a57e321ebf5a6c1b85abcabbc7c SHA-1: 7a26ed86cbcc77f5a26aa79be6984cc8303614ea SHA-256: 2192cd5e8612331457a36c28b47222e9d7a542e41e2b511096654e8ac708b2ae
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 hosted on disposable domains, suggesting a link farm designed to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/123?utm_term=agrarian+reform+lawyers+in+the+philippines PDF link annotation
    • https://zunotebizi.weebly.com/uploads/1/3/4/6/134648513/3625889.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/i7jhG8m/juvode.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/FniggjQ/28939941115.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/iiaifYH/noxamepajixuluvekakofudob.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fWQCEgh/disney_wonderful_worlds_ios.pdfIn PDF document text
    • https://wujupeduluruwuv.weebly.com/uploads/1/3/5/3/135316277/48621ab.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/gihb7ha/karasilitujawijakamovuf.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/ioqghoC/80054804708.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/cgduie5/w3schools_css_object-_position.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/jijsje8/fukewagejoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/OheHhaJ/rock_music_news_today.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/migemisozatiliwux.pdfIn PDF document text
    • https://cdn.sqhk.co/fusulelibev/E7idXTm/tik_tok_video_download_mp4.pdfIn PDF document text
    • https://robedovetukurur.weebly.com/uploads/1/3/4/7/134754045/kibubitibanep.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/xokebore/how_to_test_honeywell_humidifier.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/cardfight_vanguard_apk_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/jvc_wireless_android_auto_head_unit.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/what_are_the_components_of_a_contract.pdfIn PDF document text
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_16c57819278d45cba807f4d7aebb2c5c.pdf?index=trueIn PDF document text
    • https://28ae28a3-27cc-4d38-be83-0de1f6925f83.filesusr.com/ugd/454016_591412203f674bf3997f195d6e540ec1.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_e2d1657aecae49e885bade97908c1b59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/91852469666.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_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 5496 bytes
SHA-256: ee26da4b1857f8d4bd5a3e8b41ef9f51e5887737c09cf5341b9baf8f0acc75eb
font_01_sfnt_off0000ffcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 10384 bytes
SHA-256: d234187f822edc8b6a8759f88477d462db341f906891aafeafe3b3843226f038