Malicious PDF — malware analysis report

Static analysis result for SHA-256 463b2f614b600db8…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 22:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 81dbca231bc7ba4e3c23607f2de9507e SHA-1: 7a2d22ae5a812b513ebaeb286f0eac9d05b27c69 SHA-256: 463b2f614b600db81d061e51c3eb411138e974e64e138afab2761d246d502e0e
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, many hosted on disposable domains, characteristic of SEO spam or link farm operations. While no scripts were explicitly extracted, the PDF structure and external link farm behavior suggest it's part of a campaign to redirect users to malicious or spam content, potentially as a phishing lure or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/award?keyword=cooking+oil+formula PDF link annotation
    • https://linasiwafeki.weebly.com/uploads/1/3/1/3/131380288/getoguzamixoj.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/tunok.pdfIn PDF document text
    • https://burogoga.weebly.com/uploads/1/3/2/7/132740280/809628.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/yjeQhg1/play_tube_free_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fanekizesedi/hd5hdsX/metal_price_ticker_symbol.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/c0nXtC5/tefaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/geAc2ji/kugilamakofujetijeduvetin.pdfIn PDF document text
    • https://cdn.sqhk.co/sepetuvab/IQihHxF/41841507561.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/bFieN2s/deano_s_barber_shop_barry.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/iejhjjn/pedorojunimaterawoboso.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/fhcet3p/53360542507.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/eFgQsih/download_sakura_school_simulator_mod_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/PEy0jag/instagram_logo_white_transparent.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/hhhigcn/hangman_fracture_types_radiology.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/dilorapod.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/jhqgjOg/real_car_parking_multiplayer_game.pdfIn PDF document text
    • https://zapikomamotal.weebly.com/uploads/1/3/1/6/131606370/7172c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexepetilak.rf.gd/roots_and_affixes_worksheets_for_4th_grade.pdfIn PDF document text
    • http://fevepapowiwed.epizy.com/charles_capps_teachings.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_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 4880 bytes
SHA-256: 2388c62684885b57685eeb87d64be8dd6bf1f77905cc5fe1b7fbeb56a2460952
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10688 bytes
SHA-256: 027a58ad52642d92e7f86e508ab1ee144a1734da70e5db1f940434fe472fbb7e

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