Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b4a5d59edbe49d…

MALICIOUS

PDF

88.6 KB Created: 2021-04-10 00:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5733874057424eefc5ee4581b6ce8388 SHA-1: 2130ce0126267e542c05ff8fcbadf220c7aa6d46 SHA-256: f6b4a5d59edbe49d315736b9aebd594df3f6163b0e70209cad4320800127a5c4
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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) 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://dafemum.ru/strik?utm_term=ez+chill+recharge+instructions PDF link annotation
    • http://lighttravel-ng.com/26908953919ieerf.pdfIn PDF document text
    • http://p-kavkaza.ru/theory_of_relativity_explained_to_a_child7cemu.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/gfginid/kuxora.pdfIn PDF document text
    • http://discount50.pro/cisco_dpc3010_docsis_3.0_cable_modem_default_login65ywf.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/a9EghX1/bases_of_power.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/gjjh6hd/bannerlord_start_own_kingdom_or_join.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/PjegeRF/linukazunimulugalemisose.pdfIn PDF document text
    • https://cdn.sqhk.co/gixaxukejamu/a7Djggf/gikopewavoxovofe.pdfIn PDF document text
    • http://sun-italy.space/kudesekopuliwezazodufaln94qz.pdfIn PDF document text
    • http://salonhq.xyz/wiforujoxepeudd2h.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/donukadizolin/jar_of_hearts_piano_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/cardiovascular_physiology_lange_free.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_e402e77b1600498584d1f1883a3b9b9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/ajay_atul_songs_2018.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_db1c7c3638d049dc803fada97bff5a4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/47473579931.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_29f1f83f08394e50956c5b6f58a37c71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/21981893726.pdfIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_1cae88629fe14416afc4a635f52881a1.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_dd51f67e9fe54fda835f66c547d3e1da.pdf?index=trueIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_e6b8c9bd27734ca39faf8a2839eb2757.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_6d349354d6464fc4aba3b4e52a11b6c9.pdf?index=trueIn 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_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 5068 bytes
SHA-256: edb145343bc14e336ee3a2b14151bbef37aa6dfd0ee2b8d3340302b12c73c03f
font_01_sfnt_off00012dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 11580 bytes
SHA-256: 42d0dc83b5f378a85370a2cf461a4647179eded50bb366aae87009eae3732924

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