Malicious PDF — malware analysis report

Static analysis result for SHA-256 9367fe480a166e35…

MALICIOUS

PDF

91.7 KB Created: 2021-07-22 13:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 197aa2364f09b5e651c5fe4592c74c25 SHA-1: 90cf5a85f1a5eaa07082851cd325cd475cfc4feb SHA-256: 9367fe480a166e351d0a1d5fc1e272c2a9287f6f71d7bfefb3542f1a1af9b6de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to lure users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t2t9u98njep39o6t6kap0vpjbq/36572663489.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/82873980870.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/nevebopejutizikipibedu.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9fddf462c1e99b12646ab40b2b443154/87618445925.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/91475737753.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/95248837821.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/wikubexadogiwonirem.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50df58b8b---pepuwowafevasim.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cf1cfd7d---tofogovakuzinulexuzi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c532e55ccf9---93371541235.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/22579182532.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/103c99e4d5241e1b0bbf35cd70e349ff/gotatifubewodanisidonevom.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070853f47bb4---77273677791.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/44887790675.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/jiwopeg.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160814834b26f7---56455477000.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/okb22pndrsauki94jvttd1v217/xejuvuzejumujaw.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609402122f83e---momipadivazewewuwufubi.pdfIn PDF document text
    • http://446888.top/userfiles/file/tizab.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2u7ja0k4fsd98qnk4iud1ast9u/lewapegovuragutopewoxewo.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/mawojuzegedokokosidasomud.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe9b10311---40537690625.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/zixenivasotazidorot.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/11360535804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=topics+to+write+an+informative+essay+onPDF 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_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 16484 bytes
SHA-256: d451c8075e71141cccb9a3e9606b49c2cfbb324071040938cadcde6a12189883
font_01_sfnt_off00012d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 10824 bytes
SHA-256: 4a8a70bf20e2ae62aef8c95c42c75efb28a1dab155d3aab9a70bfb3ce89d023f
font_02_sfnt_off0001466c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1