Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0f19ed08d0a437…

MALICIOUS

PDF

79.9 KB Created: 2021-09-15 23:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a1a9470ce0cc233cd37cf1f7c0663cd0 SHA-1: c9ce9623eba5ea47a6f5f68354e43183e12a35de SHA-256: 7a0f19ed08d0a4378387979fbd870928603386c6c9331543d3cf32c61c1fe6cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of external URIs, many hosted on disposable domains, characteristic of a link farm designed to obscure the final destination. The presence of numerous unknown URLs suggests a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://eghamatkade.com/basefile/eghamatkadecom/files/60236424349.pdf In PDF document text
    • http://odontotecnicacoop.it/userfiles/file/mexobefiluxaduwawalitikus.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/6070578810.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/31480904948.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/fuxex.pdfIn PDF document text
    • http://northcity.rs/slike/files/20493866714.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/70329452331.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/zigiwepifawutamalowumeg.pdfIn PDF document text
    • http://grafitym.kz/files/file/74953201751.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/temopebikudewoxod.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/tenigomube.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/nomegivezozanomufenone.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/muruleninetorelabi.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/93477523714.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/jejozumij.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/10096536577.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/99492670032.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/dugowomusafurubizenum.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/gifejuzuz.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/31291672540.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/32158847595.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/woxifukaxanip.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/52765748216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+11+for+pixel+3PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 17336 bytes
SHA-256: 4f08fe0f43fccd0efa0c88afb76d89756c52e5fdb1bdf8b2a6da13915b73bece
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 10368 bytes
SHA-256: cab547fa773224c7d560c453099ea6f67a6ac02d2a2059e5a2424bf852a9d105

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