Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af0551b1f1ba6ba…

MALICIOUS

PDF

104.0 KB Created: 2021-03-14 06:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc69d575d00ae304c651cafc3303bc8b SHA-1: d10924fab3c49f82cc526c731b88da733b7aea52 SHA-256: 1af0551b1f1ba6babd91d598850da97cd4cbca36cd98d3bd55434936877d8de3
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains numerous embedded URLs, with a specific heuristic identifying it as a link farm on disposable hosting. The primary attack pattern appears to be directing users to external websites, potentially for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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=caliban+s+war+pdf+free PDF link annotation
    • https://saxiwevirakete.weebly.com/uploads/1/3/4/7/134715854/minezoruberawi.pdfIn PDF document text
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/tasiresubor-misoxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5fee8514aa19a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5fdceba4cf2c8.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/cb8d1262eb5cccf.pdfIn PDF document text
    • http://mybestchan.online/fibovesofi5rpac.pdfIn PDF document text
    • http://flowerport.market/mini_basketball_hoop_meijere70vp.pdfIn PDF document text
    • http://youtube-subscribes.com/el_pollo_loco_menu_with_prices_2020geuqd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_603294533aeec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_5fd78d53168cf.pdfIn PDF document text
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/cdcc7eec33b.pdfIn PDF document text
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/b584cd1ae2.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/c867de4392163c.pdfIn PDF document text
    • https://wajutuba.weebly.com/uploads/1/3/4/6/134656264/4317467.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_60072af0333ca.pdfIn PDF document text
    • http://okclub.org/que_es_una_maquina_simple_definicionc53p2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixuzako.rf.gd/26513162545.pdfIn PDF document text
    • http://konapawejiwevin.epizy.com/data_and_reporting_analyst_jobs_toronto.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/chronic_constipation_management_guidelines.pdfIn PDF document text
    • http://gojofim.epizy.com/wesowijufiwogeletu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/22414087210.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/44345972986.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/bipap_vision_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/25148980913.pdfIn PDF document text
    • http://sikadakomog.epizy.com/63222870928.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_off000159d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D5 5172 bytes
SHA-256: ad0e3a9ab22c02671e41a6477687c4498e4b8793004b3f7423df23a7990d4ab0
font_01_sfnt_off00016b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B80 11676 bytes
SHA-256: 35683f99cde6287d18acc2749ab4695910718ba67535f4e6d5736039de4dca5d

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