Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01549ecec32a8a2…

MALICIOUS

PDF

87.9 KB Created: 2021-09-09 18:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe3154fa53e1f7e06720ddb099e80aaf SHA-1: 4f0957804015105792415a7c51c6a0adb5006885 SHA-256: d01549ecec32a8a2f0349dba0a6d5930a4a6fa382941ae0fdc2d2405805c6134
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://hak-al.com/resimler/files/mefuvujabenolozetopa.pdf In PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/zebikagekat.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16134858f668b2---dizasitixurekumorafip.pdfIn PDF document text
    • https://kultmotor.hu/images/files/12510227019.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/69231117966.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/vuxuzibosow.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/jalasojawedaxazofajexov.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/tujogejemizazizegibolunig.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/tokujepugu.pdfIn PDF document text
    • http://jaqalsports.com/files/file/tugajikisode.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/delolizig.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/taredawijapobim.pdfIn PDF document text
    • https://onwater.my/uploads/file/22591565131.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210905_700228CF5BF3A639.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/43455642277.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/32873209999.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/62915512050.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/ferumudinapabopu.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/fipojuxowawaluvapivopibod.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/finonerebi.pdfIn PDF document text
    • https://armenia4d.com/contents/files/kagijogineji.pdfIn PDF document text
    • http://signauction.net/userfiles/file/pimadepuparudeg.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/40603638186.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/zesizajiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=lords+mobile+hack+iosPDF 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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 10624 bytes
SHA-256: 5487874e80677642a119440200e1841a3b1fe7cf97763dafee7135ab89cc9ebf
font_02_sfnt_off00012098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 18716 bytes
SHA-256: 1adf245486fe017edfbe98ea43ca4affe52c3375cae75b1495e670f6e830b659

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