Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9445c20c9dcfd47…

MALICIOUS

PDF

100.0 KB Created: 2021-09-21 17:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 39dab5905569b3749db403ddca8ff7e9 SHA-1: 6533f038631cee464f1c21c96eb0318a5aaa4c58 SHA-256: d9445c20c9dcfd47a8ffcddcaaac88f72c5c169fbb8597fa61561009e902b118
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded URLs point towards an attempt to redirect the user to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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://inwebjor.ru/uplcv?utm_term=dragon+ball+super+broly+123 PDF link annotation
    • https://greenbins.ca/ckfinder/userfiles/files/nurug.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/pexodikujegixoxafunemega.pdfIn PDF document text
    • http://snft.ro/media/file/72487835051.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/zemoveluzovojaxizozafaso.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/19157562213.pdfIn PDF document text
    • http://napiarsaigh.com/images/19122933173.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/82941209116.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/24052764315.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613040ebaf448---xemonezufixokurimuzuwuwed.pdfIn PDF document text
    • http://favourtec.com/attachment/file/47254002876.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/78835927797.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/motariz.pdfIn PDF document text
    • http://dongphat.net/upload/files/51642767935.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/14294738857.pdfIn PDF document text
    • https://pcetravel.com/files/file/5734660299.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/91351746225.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/bitoroduputud.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/78485637587.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/89942775957.pdfIn PDF document text
    • https://riwg.in/userfiles/file/33581075772.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142bbe279c9b---sedefumomojuxuxef.pdfIn PDF document text
    • https://maviet.vn/upload/files/rifiwatoto.pdfIn PDF document text
    • https://eslms.com/userfiles/file/visofotimawisefowuruxaru.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109191409284309.pdfIn PDF document text
    • 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_off0001192f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192F 10936 bytes
SHA-256: 3518ff35f3b3d6f1b8e785de563e0f5ec8488282ee22aff5c18349443a531798
font_01_sfnt_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 21276 bytes
SHA-256: fdfdbc9905b12f8036d9e246130f7124b942d8b3c8d094276bc333ec618c9551
font_02_sfnt_off00016a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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