Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3809772143e2a42…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 11:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0d711193f6da430931e3ecad61504cfd SHA-1: a84b042157bd1efada1ca95e16db840148128cc0 SHA-256: a3809772143e2a4295df6c0da408d03ac5ecd202ca5726b190ae56e1f8450631
126 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 URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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 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://druttle.ru/123?utm_term=lumen+learning+answers PDF link annotation
    • http://gugezebaz.mygamesonline.org/47257261405.pdfIn PDF document text
    • http://natotakujoriw.iblogger.org/errant_hunter_soul_leveling_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/Oiajehg/wopejafedixijewumiwakin.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ht7ojhE/pedokuriva.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/ifFjcja/nfl_network_schedule_sunday.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/hegeAaQ/happy_gilmore_shooter_mcgavin_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/Cqe8qjd/48726967923.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/83nubdI/sozevejefe.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/why_19_in_covid.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/11301086192.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/B7ibCWw/monster_hunter_world_wiki_fatalis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f679957-eff6-4471-a50d-a2b21f632c1e/what_is_the_best_reloading_powder_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/21930931231.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/alessandrini_fifa_18_inform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e2313b-fbe5-429c-b3fd-dcb42a84a6ae/37647403937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2ba60c-25c9-4784-be66-8972c6b33cd6/12618846372.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/bimetinejujetezimevekewa.pdfIn PDF document text
    • http://bowomufe.epizy.com/atf_box_setup_11._90_free.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/one_handed_axe_fighting_techniques.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 5036 bytes
SHA-256: a1eafe8cd6a12942f60e6b936da1ad23b1babe8552e125fce7ebcd56f24698f8
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 11032 bytes
SHA-256: 680828e00479b96f0e9b6b5ae7b44810d8159c99a8d46cd70d4d0f5a7d38ba70

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