Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7828207c5f24c00…

MALICIOUS

PDF

72.9 KB Created: 2021-03-05 09:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8b15d1ae9159e85877463c27343d420 SHA-1: d90d602cbceee617f444601e357d1636b154d4bc SHA-256: f7828207c5f24c003959e6d06faac722705d638238c6f2bc4d82be3b6bb62623
136 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, with a prominent heuristic identifying it as an SEO link farm designed to redirect users to potentially malicious sites. The primary redirector URL is identified as 'https://lozipotod.ru/wix?keyword=cowboy+cha+cha'. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest an attempt to drive traffic to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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/wix?keyword=cowboy+cha+cha PDF link annotation
    • https://s3.amazonaws.com/fupanabivote/ignou_assignment_solved_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/4x4_oll_algorithms.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/how_a_bill_becomes_a_law_philippines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_60134d7c1ed68.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/samsung_series_6_55_inch_smart_tv_specs.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/significance_of_bollinger_band.pdfIn PDF document text
    • http://shoop-ft.ru/852852487630xmx2.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/kufokaxoru.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/7th_grade_math_minutes_answer_key.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/ipod_mini_watch_case.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/49026137684.pdfIn PDF document text
    • http://es50off.pro/mewuso2wlml.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/assassin_s_creed_apk_gameloft.pdfIn PDF document text
    • https://jokiwuruxuwam.weebly.com/uploads/1/3/1/4/131437523/5340657.pdfIn PDF document text
    • https://wirazalalotun.weebly.com/uploads/1/3/0/7/130776536/8304241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601ca915e9819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_6021964b161c2.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/easy_smoothie_recipes_with_yogurt_and_fresh_fruit.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/angular_7_forms_module.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 4820 bytes
SHA-256: e2e6235387ee0b834f04674914e0e71455836e4a61efa7f0e9fbfadad0ecc76e
font_01_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 10184 bytes
SHA-256: 0e1b554c905a56415a16798629dbaaf2bbec0c315a273f48cc3d5a2e204b5e6c

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