Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbf4226663608f9…

MALICIOUS

PDF

74.8 KB Created: 2021-04-02 16:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 577170fd3f50011738663e34f4f20b4c SHA-1: 79d01d212511051b801415c445185e25d1a67b64 SHA-256: 9fbf4226663608f96a42a1b701a80b8a0803c96d7e7239b8b51e417e0c0bd06b
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. One prominent URL, 'https://seumenha.ru/wix?keyword=detroit+diesel+dd15+service+manual+pdf', suggests a lure related to service manuals. The presence of multiple disposable hosting links and a link farm heuristic further indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=detroit+diesel+dd15+service+manual+pdf PDF link annotation
    • http://cabinetsly.xyz/free_song_chapak_chapak8bmwi.pdfIn PDF document text
    • http://silkhfig.bid/58465852372hkod8.pdfIn PDF document text
    • https://zegasapazenavu.weebly.com/uploads/1/3/5/3/135326880/8176912.pdfIn PDF document text
    • https://jarovoxo.weebly.com/uploads/1/3/4/5/134511136/1764205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_6005fd93a9205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_60481c48c0936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_605ad30dcc7b2.pdfIn PDF document text
    • https://vixikuladiwepev.weebly.com/uploads/1/3/0/7/130738731/461b644b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffff7acf29ca.pdfIn PDF document text
    • http://domodip.iblogger.org/50354990138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_60019180aecbf.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/53968810804.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/zisulamisozoto/titis.pdfIn PDF document text
    • http://zuwapiw.rf.gd/mcafee_antivirus_for_pc_free_2019.pdfIn PDF document text
    • http://fanulatanaz.rf.gd/anti_ulcer_agents_pharmacology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be975273-b8ae-45ad-80ad-6d53f10ad5fc/tuxojazesurafevebuketaja.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/aptal_beyin.pdfIn PDF document text
    • http://bubilegire.epizy.com/12_tenses_in_english_grammar_with_examples_in_tamil_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3209f6a7-aea5-47ee-95fa-e81b227fac8d/united_states_army_reserve.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/41595356853.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/jejumofabovi.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_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 5536 bytes
SHA-256: 47da54bfc59cff4634c64361aedf42f27fb76ce907f81b52a3200bebea0f5957
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 11088 bytes
SHA-256: 8ca0c503243068137f142a7ae17b81f6332b3b82f1cca12fe642d587ac2521a9

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