Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bbb2d5a2e12f1b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 04:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37dfa5a9125bb19d7287d3e365845957 SHA-1: 0c539c6dfb164049d5e6400c48c5e3b2ca9d5a2c SHA-256: 38bbb2d5a2e12f1b27873888ce8f46464b422f02655d043e66b12c253124ff6c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a ML classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond what the heuristics and URLs suggest.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5238

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 http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tubghu1hc98131pct5o3ijakj4/gixas.pdf In PDF document text
    • https://aqualibramontois.be/fckdownload/file/26921612155.pdfIn PDF document text
    • https://natanashoes.com/kingkong/userfiles/files/5029882159.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e705c569c---33838857573.pdfIn PDF document text
    • http://freeorden.com/media/file/sibewevodufobelaz.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/kebanalazosab.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210913205810_mse8jf.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/zunusewakimafovebiwenupo.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/doraku.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///variz.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/viwobivifexisip.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/lumorososopar.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/79480053344.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/1923553646.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://houstontca.org/Content/uploads/files/judifumolasu.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/nedegexajat.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/2084425843613c36d38567a.pdfIn PDF document text
    • http://vo23.ru/upload/file/jujagon.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/vivageg.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/70860854566.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/62726710196.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/66406548100.pdfIn PDF document text
    • http://kammed.com/userfiles/file/julamoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+mlbb+apk+2021PDF link annotation