Malicious PDF — malware analysis report

Static analysis result for SHA-256 80eaea20e9c9dccf…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 23:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e6eeae8ddf283679fea5f8ba830d5a1 SHA-1: c1c23ddd8b3f9c59b7fcb0024df44ab566380dfc SHA-256: 80eaea20e9c9dccf39bbee87bfb0c92baf2c18391ac5645b3e533f54f0b3f778
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'free download' and the presence of multiple external URIs, including one pointing to a link farm on disposable hosting, suggests a phishing or malware distribution attempt. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

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://pelibifir.ru/award?keyword=the+adventures+of+tom+sawyer+book+pdf+free+download PDF link annotation
    • http://shoppermarket.online/how_to_use_logarithm_table_for_multiplication_and_division78ve5.pdfIn PDF document text
    • https://munelexogetajax.weebly.com/uploads/1/3/1/4/131437313/8042337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_606548644a6d5.pdfIn PDF document text
    • http://cethq.xyz/1997_honda_shadow_1100_battery_coverfp4zk.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ZI8heig/photo_editor_app_download_apk.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/wuforisukabos-ditokodofupese.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/hjcuuic/little_alchemy_cheat_sheet_life.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/3ad7e59860ef122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6050f8f6a278c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_606304f3dc613.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/rezebivenalubag_mufum.pdfIn PDF document text
    • http://santand-es.com/bilesegefuzolojjrq.pdfIn PDF document text
    • http://mnclassis.org/14118799224at7x4.pdfIn PDF document text
    • http://tehnopolis.org/52491487179drj35.pdfIn PDF document text
    • http://app-3null.com/966654791220y9hf.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/06a888b8-e3a2-4111-aece-0b9397ed86ce/contract_law_definition_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ddb64d-c07f-49f7-9f2f-e5bbab1755e4/35513347890.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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 5688 bytes
SHA-256: 44ca1325a7b242cfeb7aba7162f60c00406f4831e6d9d450b2f1072982a56363
font_01_sfnt_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 11428 bytes
SHA-256: 8cb95811e7b33001973fcb0aecd23428186c07f924c887a0d8da21803e42cc08

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