Malicious PDF — malware analysis report

Static analysis result for SHA-256 e517ebd916a28345…

MALICIOUS

PDF

76.7 KB Created: 2021-03-13 22:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8048b438b0413190a6aabc33be032684 SHA-1: d4f5645c70ebc041d838a6ea2dd3a8540152ce25 SHA-256: e517ebd916a28345d345a993fd2455c4c9306afc6bc95f2756aa255da20b13ec
146 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting and contains external URIs. The presence of a callback lure suggests a phishing or tech-support scam pretext. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/wix?keyword=quadrilateral+quandary+worksheet+answers PDF link annotation
    • http://tulomodev.getenjoyment.net/tisomerijatusakib.pdfIn PDF document text
    • http://nonly.xyz/arabic_quran_with_urdu_translation_free_download0b11c.pdfIn PDF document text
    • http://gufutaca5.xyz/7366854147mv993.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/mowojasoz.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/58790951944bz6l8.pdfIn PDF document text
    • http://banquepopulaire-fr.org/what_is_clothes_without_a_consciencem8aod.pdfIn PDF document text
    • http://legalvictory.group/brother_hl-3170cdw_troubleshootingr8t9c.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/was_the_movie_shining_through_based_on_a_true_story.pdfIn PDF document text
    • http://philonio.online/lnh_nam_chch_qui_trn_the_php7v94s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufevexos.atwebpages.com/transverse_abdominis_exercises_physical_therapy.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_a283a8e71485446191056d90e9427770.pdf?index=trueIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_6b8f42104eee4ddfbf0b5b918a80d51d.pdf?index=trueIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/63374994228.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_10043ebc4c8848f8b45a619af5ae4d58.pdf?index=trueIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_84d1eb1ef08d43179e035d62e1f1b8d8.pdf?index=trueIn PDF document text
    • http://fovawipemezipu.myartsonline.com/nowizojamaju.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/vox_delaylab_price.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/1232990308.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 7

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_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 5360 bytes
SHA-256: f64d6830b622fd23326abc3c23ebedc4c37e112e543533083b68eb87271dd17a
font_01_sfnt_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 10936 bytes
SHA-256: c38b7389751473b31ad69d228d11f4c448283b5edc643da35d6fbe257d25eccf

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