Malicious PDF — malware analysis report

Static analysis result for SHA-256 a564781ab78db319…

MALICIOUS

PDF

82.8 KB Created: 2021-02-28 00:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b0b88486f8c7c986cb3327e527910f4e SHA-1: 8c3bc3fb0854d0c134e5d3c8134b2a54c3a65732 SHA-256: a564781ab78db319673ba7609f456213a9ecd52502c7dd7c1b5fbb72f3e00eaf
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards a malicious document designed to redirect users to potentially harmful websites.

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://lozipotod.ru/aws?utm_term=el+personaje+de+clara+en+la+casa+de+los+espiritus PDF link annotation
    • http://kazuxigunifaz.22web.org/series_and_parallel_circuits_worksheet_grade_4.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/boxifef.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/G1X0ieF/dark_sword_dark_souls_2.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/radef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403127/normal_600484e5ea693.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/7e409ea.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/zesonutipaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_602a1d0bc2547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fe2aa10c443a.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://nemidet.epizy.com/gujarat_high_court_assistant_2018_answer_key.pdfIn PDF document text
    • http://kajonefev.rf.gd/hp_photosmart_d110_driver_is_unavailable.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/club_flyer_templates_free_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/hampton_bay_ceiling_fan_remote_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/wot_is-_7_guide_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/dovujagizadizulogaw.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/how_to_insert_mendeley_citation_in_word_2016.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/safety_1st_car_seat_installation_without_base.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 4980 bytes
SHA-256: 42d3e88ba0857e1d6556e4cdcd61fec472c0868ce31f3f1c414c20b6ea5cd456
font_01_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 11780 bytes
SHA-256: 3bdad3061e9435a2c3c3d26895643e24c5007da0112c8f26c3cb68099802f98d
font_02_sfnt_off00012d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D46 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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