Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5941b5106130f2d…

MALICIOUS

PDF

73.6 KB Created: 2020-12-09 21:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2e633c4df429c9f6d0ba6e2050905dda SHA-1: b6902657f82f08c1a88f36b3a0aa31c243c1432e SHA-256: e5941b5106130f2d7509152fa35d62f4299abf36beccef52e5d9fbc54bdd6532
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URLs, 'https://trafffe.ru/aws?utm_term=4+player+cribbage+board+template', is associated with a lure related to a '4 player cribbage board template'. The presence of multiple external links and the specific lure suggest a phishing or scam attempt to direct users to malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafffe.ru/aws?utm_term=4+player+cribbage+board+template PDF link annotation
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/vexodamajejaje.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
    • https://static1.squarespace.com/static/5fc69486e2fce462bcb34d3e/t/5fcc97db05ddc9599d1c44da/1607243744911/clueless_fashion_pink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e15379-df08-4d81-b5d3-097d391e5e81/serial_to_usb_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2d23c9-8871-4f1f-94a7-b05a09294535/el_arca_del_pacto_esta_en_el_cielo.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/wuvupilegabuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/barclays_capital_us_aggregate_bond_index_performance.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5601491241adc44ee7e/1606219104981/78502300281.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/out_of_many_chapter_28.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/adrenal_insufficiency_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/checkra1n_compatibility_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c2d50c-6852-42cd-9e1c-db178ada5e88/dnd_spell_zephyr_strike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a49cbb-0bcc-417a-a145-f7a54f9e001a/juretojivijefijig.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nebojoluzu.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/levixen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B5 5132 bytes
SHA-256: 24d247d8c5d564aeeaf794d864aec9421a63f012b1c3cb1f11f332508535e521
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 10232 bytes
SHA-256: d1db4af2e3621a9c55950887ac4fb5d3a6bec7ef2c423f31f806c3eb7bb87cca
font_02_sfnt_off00010b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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