Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b060aa8728e37d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-23 23:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a010d9d9acb97e567c257a27d229588a SHA-1: b39aa554f603f0345241d988498bac2a7d96bafc SHA-256: 54b060aa8728e37d8d7770b0d53ef41e338dbe740f007816384b3988850326ee
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Htc one m8 charging port', suggesting a lure. The presence of numerous external URLs, many hosted on disposable domains, points towards a phishing or link-farming attack pattern designed to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is being leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=htc+one+m8+charging+port PDF link annotation
    • http://it50disconto.info/tepomajubeputog33wow.pdfIn PDF document text
    • http://greatholl.com/28792809046xug36.pdfIn PDF document text
    • http://fullpisetc.ru/mantis_tiller_manual_7225hdg5y.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/Pujbx2W/skins_on_netflix_season_9.pdfIn PDF document text
    • http://localdesign.me/cuanto_equivale_10_milimetros_en_pulgadasx3l4n.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/fohWTXy/best_ringtones_2018_free_download_english.pdfIn PDF document text
    • http://chambreop.xyz/panasonic_viera_plasma_tv_speakers_not_workingbfj0r.pdfIn PDF document text
    • http://pushbiz.fun/jatilowukn2h3x.pdfIn PDF document text
    • http://noksipals.online/9679428554bbmp7.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ciiXjfj/11077262835.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/pREgdja/54524391099.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/diccionario_de_filosofia_online_ferrater_mora.pdfIn PDF document text
    • https://cdn.sqhk.co/sazuzaxokuk/dhiie8L/barbie_rapunzel_doll_amazon.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/wowejufajikinepokiwavibim.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/jerokix.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://s3.amazonaws.com/ruzumeb/auto_trans_manual_valve_body.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/everfi_module_5_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/repofawoxutefisekizutawut.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/templates_for_portfolio_cover_page.pdfIn PDF document text
    • http://guseboses.atwebpages.com/how_to_build_a_model_truss_bridge.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 5080 bytes
SHA-256: 3e23d09b0bfe4af88bffdf0207a6de2a4a4031e78abbe2c17392baa7a4afb76d
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 10524 bytes
SHA-256: 3503f5e924ba65ebf57318e9ec5a8dda776b509abfd2870b406474126f4f65b2
font_02_sfnt_off000126bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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