Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b7801eb9a38e6b…

MALICIOUS

PDF

75.7 KB Created: 2021-06-02 05:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7c09e95b78d9922b80cad8e34bdc2383 SHA-1: 5180a15d53dcf970914d29e63043e89a942e0dd9 SHA-256: c7b7801eb9a38e6b5a1bd98675b0eb42ef25bf6f62b0326ce0704d2c50b44514
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to a site that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to resetting Amazon Fire TV pins, suggesting a phishing lure.

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 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.
  • 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://philabc.ru/pbw?utm_term=reset+insignia+fire+tv+without+pin PDF link annotation
    • https://fimizugowukabi.weebly.com/uploads/1/3/1/1/131164572/357021.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/sizojipeberere_peminuker_xutekeka_zebujizugukuril.pdfIn PDF document text
    • https://puxekubokoru.weebly.com/uploads/1/3/4/6/134683715/kedemider.pdfIn PDF document text
    • https://burubigek.weebly.com/uploads/1/3/4/8/134884838/7a0374.pdfIn PDF document text
    • https://borojiwanap.weebly.com/uploads/1/3/4/2/134235821/wurosadidu.pdfIn PDF document text
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/1959121.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/6610064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekipirunezi.pbworks.com/f/61176828898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7336a9c2-8711-459f-a596-0970841dd961/73254253572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3563ad64-1f98-4531-9ba0-c253aafc17d6/93896063766.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144476310/psikoloji_ders_notlar_tython.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b83f17-4ca9-4030-a751-18fd91de25f1/d_and_d_delivery_alamogordo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83706076-ed42-487a-8e12-2276146e2bc3/rolobaxotiregotazoretu.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/minecraft_unblocked_no_download_at_school.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/wetonefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0539542-e605-488e-8ae1-7f54db15d512/warhammer_generals_handbook_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ac8696-5f9e-4a60-b2a7-068db43db069/bagit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed12ab63-1405-421c-8e83-e6726163c3fd/86562450813.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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 5288 bytes
SHA-256: a727d05cbf26258dfed4adc8135e71cc86318ce68ff737de5b8b5adf764b7ad5
font_01_sfnt_off0000fd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD01 10772 bytes
SHA-256: a49a5ebc19ee568412c374f156c9038e8e16525d8d48d82306688db807776e72

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