Malicious PDF — malware analysis report

Static analysis result for SHA-256 809f49cf2ea49759…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 03:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 099bf8f22854c639fc4ac14d209f6202 SHA-1: b57dd543bc70e5ed142a8728a554898240273e1a SHA-256: 809f49cf2ea497592221cfe83f36d9ed349fce96c6558f93f48cde32038e1325
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and uses suspicious links to lure users to external domains. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. While no scripts were extracted, the embedded URLs are the primary indicators of compromise, pointing to phishing sites designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/wix?keyword=help+me+i%2527m+dying+sound+effect PDF link annotation
    • https://cdn.sqhk.co/rubogomuweme/jjbSyhj/pokemon_go_latest_news_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/eCjePjd/79790056207.pdfIn PDF document text
    • http://casser.xyz/agricultural_land_guideline_value_in_tamilnadugd3a5.pdfIn PDF document text
    • http://lnstagram-support.live/fantasy_premier_league_rules79o9a.pdfIn PDF document text
    • http://prodive.su/at_t_u_verse_vs_directv_channel_lineups9kkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486367/normal_600a53344fc97.pdfIn PDF document text
    • http://uscreditscore.info/77628133598bzfhl.pdfIn PDF document text
    • http://snail-case.store/xebameduxesulakuvukarowbldp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_600cab686b222.pdfIn PDF document text
    • https://cdn.sqhk.co/dilipokoje/bhbghje/crafting_idle_clicker_guide_fr.pdfIn PDF document text
    • http://probkin34.xyz/196300617928jkb3.pdfIn PDF document text
    • http://reduslimitalia.site/fovafaramnt4ik.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/Ahaaajb/nutapemagovoz.pdfIn PDF document text
    • http://daating19.site/truc_de_grand_mere_contre_la_toux70ccq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5fe83be894341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fd066e5c3307.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/Qdicib6/wonder_park_magic_rides_attractions.pdfIn PDF document text
    • http://adanakebap.org/76115316559sfl3l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3d3741-952b-4132-a745-3a5b8e228978/python_read_write_text_file_line_by_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e7fd1b-e985-480d-8438-80e716bc7512/82246702877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eafe30-ed34-49c2-bef5-0fa29dbd4ba5/bariwagugipusisala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb2afe0-8fe0-4f20-8e63-36ffb8578db7/46856754474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb721d51-7246-4b7a-97cd-d9294ea9cf3a/is_double_dating_good_or_bad.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_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 5268 bytes
SHA-256: 0c3210639c494dcc3515aa21f24d737624ed3445d56f62d1f0ced0391767205d
font_01_sfnt_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 10456 bytes
SHA-256: 56f31e76a686b22ef838eb7e9dfaa38bb49e3faec3709f24a0af98de62da8585