Malicious PDF — malware analysis report

Static analysis result for SHA-256 332ffa2dcae4c692…

MALICIOUS

PDF

62.3 KB Created: 2021-09-11 11:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3fad7ab1db95c735f020ad256128225c SHA-1: c502ab6ca782a4a47918d4d556a59fc870045e30 SHA-256: 332ffa2dcae4c692013dd82b203fa416c632073f92096641cb008b44a44457ff
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://reicar.dk/userfiles/file/wufukodu.pdf In PDF document text
    • http://mabifitness.it/userfiles/files/fokifegatapiba.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139808c6ae53---mizolipujerekemi.pdfIn PDF document text
    • https://trainova.com/userfiles/file/kekimeped.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed595f1b2e---19062758712.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/pizokol.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/22fc72f3d3160790860461100092140a/46533718970.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/kivagisibamoduvuvubinixu.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f4363a883ee6a62a731ebd06dadc075f/57565325864.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109071404429770.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdb4ca32dc---wasimufogobuxotexavu.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/51527808314.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/wajemolunekazajepamafa.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318f754116f---xujajowerosoleku.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/78295631246.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/fipopa.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/5980621750.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109010157156771.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/nuxafusovitobodifefeb.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134d0fc41434---75723073576.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/17544193907.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/doradarupam.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16133f4928c1a7---kepuvafavimik.pdfIn PDF document text
    • http://guowangcable.com/d/files/19331689792.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///mosab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=motorola+android+dual+sim+mobilesPDF link annotation

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