Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2889f0b70ebfded…

MALICIOUS

PDF

78.2 KB Created: 2021-09-26 22:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c0b4a3cc233b778b22b2998e29fefe3c SHA-1: 7ca1d6cf4ce45f81e43a4bc57ebbb03b484fbec1 SHA-256: c2889f0b70ebfded4130de01d3f7ec3f52b63b6ddad69457dcdd3cf042f4a7d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://garglob.ru/uplcv?utm_term=android+edrawings+viewer PDF link annotation
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/35806284703.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/27516334168.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/42212818930.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/7088902599.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/29700634370.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/39807419039.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/vosuxete.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/14197958481.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/maxuzogawifosiwolifudem.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/lavorovizololuditadesol.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130811578ac8---45926973157.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/xepamorugolafetimuv.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/sobifozijajukexob.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210925105202.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/35816731285.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/rumoridawokewapafuxemevip.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f772804f41---giweturexebeku.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/73705428801.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/85130319167.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/20131742781.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/95535502625.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/fomugaboj.pdfIn PDF document text
    • https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/36485991846.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_off0000c2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DC 21332 bytes
SHA-256: cb87403b22616d191978697f604838e066245dd0ae54d7163008e3e512f77152
font_01_sfnt_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B3 10412 bytes
SHA-256: c1242b3ba85aca7f754a13d2f9166b0829222bc3ed22d310dfc26d41dea34458

Open this report in the interactive analyzer, or submit your own file for analysis.