Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abd105163ccf90f…

MALICIOUS

PDF

529.9 KB Created: 2021-07-03 11:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eaa51832e80feaf412cd40fb2f1e99b7 SHA-1: e8624833c4f1ef4c8d4c1d48f4603443a08d661a SHA-256: 2abd105163ccf90f1b63f5c389d2b31d0127f813e1dc318ceace3c6dc0f8c2f2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and a machine learning classifier, specifically as a phishing trojan. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing lure. The presence of external URIs and a high risk score further support a malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7479

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://bpsstudio.hu/uploads/29334269654.pdf In PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/voximozoma.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/tetitakujorix.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/91a10889d1fc195c3a26e4587a878e3b/4154379489.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/soriwumisowame.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/dubafu.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/1o6k5ettvmi6mkqelagqfdhq36/40113342811.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/49579589602.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/38583202536.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/d3febcb7ca0dd3d3fe48e961e31c3f96/dizogizulipuzuziret.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/9ed06c4888c03614a2f05441582d9789/47069103916.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a55054a46b399051d338adaccbc0daf7/zonemanevu.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/zifujisatijafatu.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b37e1304985---tirokataxeko.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bp7pi9vvbl9tnttdtad34kba5n/lovodelotiputolo.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6d36c922---senipu.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/felisovazilexozale.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/38ekjp4lfuo7k68cj8oaeqpn6h/86532576313.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/45c7cf6504328ea9c49607353c83bb6b/mageweneb.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/kulura.pdfIn PDF document text
    • http://babamoleskine.com/files/file/fadosi.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/lelubopi.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210613_001937.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c6b3438a5afffbcc7e1ab4906771b103/67490165115.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/45194006036.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/46772248436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=a+right+circular+cylinder+is+inscribed+in+a+cone+with+height+h+and+base+radius+rPDF 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_off0007cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE6 21052 bytes
SHA-256: ccccf861a1377bca47292aef039aa133fdc8eb9c9283f6db7193046b81304091
font_01_sfnt_off00080480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00081c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C98 11072 bytes
SHA-256: 3ea5418c80bbb1650c29ca796003a350b635f1e82d4f23c726367b68031b70de