Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4e807c14df42d2…

MALICIOUS

PDF

70.1 KB Created: 2020-11-13 08:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b56fca56058a99f79ad328d988679df1 SHA-1: b0ad2ee28284b068aff78a3bfd64d457499f6bf2 SHA-256: 5a4e807c14df42d2333baa32e4ee43dac3e4f7fe10c4f4d8d3c3b9bd3206b077
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffe.ru/aws?utm_term=flinn+scientific+electrochemical+cells+lab+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8f989a75c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fad8153f09a2.pdfIn PDF document text
    • https://zumutunamoja.weebly.com/uploads/1/3/4/5/134588160/b14856.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/viboxikuz/68271650978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852ecee8-15df-4b43-83eb-33a5a2a4c2d3/crysis_2_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/what_does_it_mean_to_know_jesus_as_lord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d475ba-a0be-40a5-91d9-95d626abe3d0/puzowezolizonofolerit.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/81106314673.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/86987507591.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/numeros_primos_e_compostos_exercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/foot_washing_baptist_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/essentials_of_environmental_health_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1edd218f-3da1-4ebd-b8ed-40299f73f09c/miss_universe_2016_live_stream.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_off0000d3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CF 5308 bytes
SHA-256: 00ce91a79669b00cdb109ad83fd8d9601f47bd3ba2840b44669c03ce4591220c
font_01_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 10984 bytes
SHA-256: bf596e29d0a03b72b82cdd67db5a15cfc0931876d39478755bf1bde8c7f00b88

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