Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a35084ffaf6780e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-12 20:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b023de9a5bbd7d65f8a3100846264b0d SHA-1: 475dcfb491e5874c366fb6000bba88763c20c2be SHA-256: 2a35084ffaf6780e3be028c1161d1bda4c58aafe2b77ad5dabd9586f1f3736c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a tracking or lure mechanism, potentially related to fake software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=minecraft+pe+apk+1.6 PDF link annotation
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/65547648388.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/61290623634.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/wurelusoxez.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/43677921121.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/44103843822.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/warok.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/25430937258.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/55660498148.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/28138216412.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/wulitamap.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/rasajajozeredisezav.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/wuwiwukubevipin.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/61039206534.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/kozuforumupegabonuwuxor.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/91236118196.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/34ce2feb50032083edf153eb60a76563/69615182845.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16136b8136e654---pozofonobakugan.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/wosofufapupo.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/15808697129.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/79753862577.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/54120281959.pdfIn PDF document text
    • https://krusomying.com/data/file/16231610532.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/gomokuwovofoneto.pdfIn PDF document text
    • http://elezioni2014.gds.it/userfiles/file/nijunagilug.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://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_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 18456 bytes
SHA-256: ede578be3a43144ad8a83a15cbf9726258f88ee46a88d30be7fbbd3eb2041006
font_01_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 10512 bytes
SHA-256: 92b5d8e2da0e0b18c2975455e04be005fc417087d709a9ab06dd34b937a4e1b7
font_02_sfnt_off00012db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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