Malicious PDF — malware analysis report

Static analysis result for SHA-256 d657fdf298e04ae6…

MALICIOUS

PDF

88.6 KB Created: 2021-03-06 03:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dfd4ccbd71d9a1e0ab7e970b3e1ec3bc SHA-1: 57a872c0a028fd02059dd780b5e67a4192e4d451 SHA-256: d657fdf298e04ae6750b06ae302531e56eaad8df9d5515437fb0cc23e1d59208
166 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 password-protected-archive 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/123?utm_term=john+the+ripper+no+output PDF link annotation
    • http://radewilagimalap.iblogger.org/bimaxoz.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/tusazemuz-dimoroxumajolet-kemobuvaxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/hcifjgx/58867117835.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/BghMhf4/sabatewebesomoli.pdfIn PDF document text
    • http://bizuzoro.22web.org/rukexugukobiniwinoremuve.pdfIn PDF document text
    • http://tafasizogir.22web.org/xudawimetiraditil.pdfIn PDF document text
    • http://tebaxedo.22web.org/14413072294.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/G3if4jc/hku_summer_courses_2020.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/fb9760ee2bccc.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/gijvia2/rugby_league_live_2020_game.pdfIn PDF document text
    • http://nutejujaxi.66ghz.com/string_interpolation_c_format_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidepogomuvi.rf.gd/best_soccer_coaching_board_app.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_987ff64367854f9c82e4b748389a4acb.pdf?index=trueIn PDF document text
    • http://tiwisuk.epizy.com/66731456993.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_9386c9d7740f4947ae44f4dd761263f6.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_d305c5fa90e44e4fb801f5eccd8aa20b.pdf?index=trueIn PDF document text
    • http://dagasadat.epizy.com/pejarud.pdfIn PDF document text
    • http://fevanazenanow.rf.gd/pakistan_army_games_apk.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/nisudolovakuvalom.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_off00011e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E36 4476 bytes
SHA-256: 5cc67a9f27243369990830479dc31ccd313b90dcbfffdde801ce10d9c1609866
font_01_sfnt_off00012d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6A 11856 bytes
SHA-256: f5df29aea3b63b1f97b7fcddd05810cdee542581ffbb890f94dc0f027fd313eb

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