Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ff496a46eeb09f…

MALICIOUS

PDF

68.7 KB Created: 2021-01-26 13:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f2f9f069281e251ea76fbacd5e921a23 SHA-1: e7173b5943ab36d3e050ffef2b4d0e633c6696ac SHA-256: 48ff496a46eeb09f23351cdb2a38a00695f61b842cae811a85ce2747ccc8ad33
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting services, and one specific URL, 'https://traffine.ru/123?utm_term=indiana+sex+guide', is highlighted as a potential lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, a common tactic for phishing or distributing further malware. No scripts were extracted, but the presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffine.ru/123?utm_term=indiana+sex+guide PDF link annotation
    • https://busedulaxuxelo.weebly.com/uploads/1/3/1/3/131379622/a21d0.pdfIn PDF document text
    • https://pepizowa.weebly.com/uploads/1/3/2/7/132711999/zuxopilosimeb.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/english_song_shape_of_you_download_mp3_directbj65p.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/mesipilipu.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/c4c20436a1155ae.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/wallpaper_hd_for_mobile_free_download_animated4lar3.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/6162882.pdfIn PDF document text
    • http://golomashvanna.xyz/noperafejikibegue9ud2.pdfIn PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/pipadedi-mavaviros-tasix-sejipijab.pdfIn PDF document text
    • http://gojepifega.22web.org/cession_vehicule_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movedubeliw.epizy.com/simple_biodata_format_word_file_free.pdfIn PDF document text
    • http://mafofeguf.epizy.com/lagu_salah_apa_aku_via_vallen.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/cruiser_bike_size_guide.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/i_am_albatraoz_full_video_song.pdfIn PDF document text
    • http://nadadeze.epizy.com/ch_play_appvn.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/bodyguard_2_pakistani_full_movie_free.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_off0000d10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10B 4868 bytes
SHA-256: 48a0b23b222fb5a7801302db37c6050d03a3e5ba53006fd72a0ba63c85211cbb
font_01_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 10696 bytes
SHA-256: e80d8ff627461b57127639a3ee71ca2ac1766ecff8c6e7a1233e6cbcc56e1156

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