Malicious PDF — malware analysis report

Static analysis result for SHA-256 697b9ec427d600fc…

MALICIOUS

PDF

67.9 KB Created: 2021-09-18 22:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae14bf95658b36dd448b25de8d7e8c43 SHA-1: aed5d01a7158b797a9deb46f6af6f1afd6b3646d SHA-256: 697b9ec427d600fca272d5858a3cf47d0c52f39af82d9a2a20d964d502484c1b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6975

Heuristics 4

  • 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
  • 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://medvor.ru/uplcv?utm_term=excel+vba+export+pdf PDF link annotation
    • http://haki.vn/uploads/files/tipusubudefubogokenodib.pdfIn PDF document text
    • http://p-energo.ru/content/file/76657440808.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/lukokugeduruvifoganis.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/39180468552.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/pinixipuxopudasetuliragoz.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/kugam.pdfIn PDF document text
    • https://natanashoes.com/kingkong/userfiles/files/nizawozawulije.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/47222029480.pdfIn PDF document text
    • http://zerosquareonline.com/file/8567125694.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/65295722080.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/35155045488.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613352e701427---xidijamavunabanu.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/80324674028.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/nirokijagadomimubunakiw.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/dumefirujumupakija.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/kaladaxunubezim.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/kobumoda.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/59714557174.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/98951842581.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/vupiwawumiredokefa.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC161 17484 bytes
SHA-256: 410888ae8099571158c4e35e99d186496dc12aebc94489c05c14e059f72e6669
font_01_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 10540 bytes
SHA-256: d6cbed41673e3e2754980bb12cea1e99ffc71f0a3c11c9ed775afe0098fd3135

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