Malicious PDF — malware analysis report

Static analysis result for SHA-256 35af52767d038536…

MALICIOUS

PDF

66.1 KB Created: 2021-02-23 03:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f425a167d96cb3ed75f6316eb3600831 SHA-1: cb4b65fb5aceafd428825ee9a1327cc3bca503bf SHA-256: 35af52767d038536bf512465e8fb8ea44f1f8db9657907a262a3237f2762dd5f
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wix?keyword=milk+and+honey+pdf+download+ita PDF link annotation
    • https://texexavif.weebly.com/uploads/1/3/1/4/131454683/tusorupaperuj.pdfIn PDF document text
    • https://mexulurobe.weebly.com/uploads/1/3/6/0/136057308/fepofoxeki.pdfIn PDF document text
    • http://arenaprobet.com/asp_net_mvc_video_tutorial_kudvenkat6stx1.pdfIn PDF document text
    • https://jepigosewuva.weebly.com/uploads/1/3/2/3/132302921/tifuvove.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/jokifunakokejoj.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/zusuvibanamikomize.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/ratimuki_tulofazitovulof.pdfIn PDF document text
    • https://sumesomorap.weebly.com/uploads/1/3/0/7/130738681/kifubatujisow_debowuv.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/29355.pdfIn PDF document text
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/3623561.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/saragidulipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/18003620179.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/fugokanidigegupakupama.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/antivirus_for_mobile_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/avengers_endgame_trailer_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/chunkzz_full_movie_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/fox_crib_sheets_target.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/83158197567.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_off0000c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76D 5116 bytes
SHA-256: 92b9c6acdd8900487556353c79136332db64961f0e9ee49bb26fc72daf15a05b
font_01_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 10048 bytes
SHA-256: a188373287b60a28da311825df80a2d62ea93e44460398f228bc96971efd40b9

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