Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bdf440ad41f68d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-16 19:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3644f4c20b0f1e0d81b331100b85aa85 SHA-1: 17d7d284b06631b0386196787018b7615ccf3b71 SHA-256: 74bdf440ad41f68dfd6d7630fdc3133e0b80c1cdc2f226324b777a55b8ad5e77
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/123?utm_term=the+history+of+love+review PDF link annotation
    • https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/214550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466376/normal_5ff288fb3f775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5fcbec85eb594.pdfIn PDF document text
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/fagiwak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_60265ef02e8c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5fceceaf69728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_60288b3a88ab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407747/normal_5fce1301a4be9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_60023a8c74623.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/pivevasunuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485173/normal_5fcaf84754c08.pdfIn PDF document text
    • http://jadurunus.22web.org/altistart_48_catalogue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5fdbd8d238ce2.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://jojisoxig.epizy.com/zolivuwisegoduziwidur.pdfIn PDF document text
    • http://janoniwopezodul.epizy.com/xamujaxarexelasopiva.pdfIn PDF document text
    • http://zofewodugap.rf.gd/94622327397.pdfIn PDF document text
    • http://vadawowugozopul.epizy.com/besame_mucho_guitar_tabs.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/egyptian_cotton_sheets_vs_sateen.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 4528 bytes
SHA-256: 8c1235cae9d6d4a27dd684b33a6e6a3d3dc136345c0ef99d87d9ef1c7d28d407
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 10560 bytes
SHA-256: aa17268c750c8bf9501e8c400a6c78d56d42c4c244516f9ed9a702afade9a19d
font_02_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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