Malicious PDF — malware analysis report

Static analysis result for SHA-256 270f3b1d3a6038dc…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 06:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f1a547040d15510affd5e6ba8a7077f4 SHA-1: 5cbe7679d58f5f8f7b1e166a6075a69133e9e71f SHA-256: 270f3b1d3a6038dcd833586ce38fb55c04c75bfed8b55a3219307bf4e440ac41
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a technical guide, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=cisco+unified+cdr+analysis+and+reporting+administration+guide+release+12 PDF link annotation
    • https://cdn.sqhk.co/konosoka/cRjhjgg/houseparty_sign_up_invalid_date_birthday.pdfIn PDF document text
    • http://pimuxiv.22web.org/buy_mantis_tiller_parts.pdfIn PDF document text
    • http://pitepon.22web.org/chammak_challo_video_song_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/jhjeUIi/dremel_saw_guide.pdfIn PDF document text
    • http://tinonijo.iblogger.org/gemefavutuleju.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/ia9Hagc/rajarituf.pdfIn PDF document text
    • http://gejejok.iblogger.org/marriage_biodata_download.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/jiloluzekimujol-wanewukamu-weluv-pemibuve.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/c562c85.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
    • http://sutalinilemu.rf.gd/511._1_case_study_of_a_child_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/apple_watch_series_4_with_android_phone.pdfIn PDF document text
    • http://jisokewiw.epizy.com/fiber_cement_sheet_cladding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede4dd41-e51a-464b-8f92-909b8cd899dc/boss_ve-2_manual.pdfIn PDF document text
    • http://gonuwufif.epizy.com/85658711006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20de1244-b568-40d3-9fec-3130eb8caf51/87417255054.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/ronodawepawiki.pdfIn PDF document text
    • http://masifegudogona.rf.gd/jelobexewevap.pdfIn PDF document text
    • http://kibululugavi.epizy.com/beyond_compare_4_filehippo.pdfIn PDF document text
    • http://fufamiwebo.epizy.com/archer_c5_openwrt_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/optimum_tv_guide_edison_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/kogarun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5668 bytes
SHA-256: 781374146158ef467fb98c6749cf5febc94b440bb78a9af8c2b1c668f3ae6c3c
font_01_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 10388 bytes
SHA-256: 7491d7098bd5613308a0ebf265158cc241230087b6ebd6ac1f2d90f091f7b955
font_02_sfnt_off00012260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12260 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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