Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2f088968648808…

MALICIOUS

PDF

67.0 KB Created: 2021-09-08 12:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d43c228457798d3f95f3c21cb97ffc55 SHA-1: 13e56865ee0d8f748ed513e119d11b23b3a54d08 SHA-256: 9d2f0889686488082b9ad0cdec454f2ba51c69771fb260c41aa2df30466141b9
146 Risk Score

Malware Insights

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

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure due to its image-heavy nature and embedded clickable links. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to disguise an actionable element, likely directing users to one of the numerous embedded URLs. The presence of many distinct hosts and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://kompaspt2.com/contents/files/92797599755.pdf In PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/zadezesugilulotitelesir.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/93951790077.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/1378344054.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/25499706034.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/xewifiguditizulenaritod.pdfIn PDF document text
    • http://clingac.es/d/files/65909529364.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/dobeful.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/82212274818.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/dafiwodavewifeku.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/jifozerefuxubi.pdfIn PDF document text
    • http://herve-coiffure.ci/files/lokiw.pdfIn PDF document text
    • http://lulanjina.net/upload/files/39202554183.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613397a43e2e8---3861092284.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/wenetavufomewusawedepumoj.pdfIn PDF document text
    • http://apvn.info/userfiles/file/84240391547.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/72007164087.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/30192600335.pdfIn PDF document text
    • http://charivne.info/images/file/dixixonixelutezebiluba.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/0233ece6def8717800f5c3eb9affc20a/putadidez.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/19329328425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=toyota+corolla+2008+le+manualPDF 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_off0000ab5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5C 13948 bytes
SHA-256: cc8c7a5ac851a3364d875051e1faf040e0f7277cd2e2f7c9a4d86c95afc7cdd3
font_01_sfnt_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 10756 bytes
SHA-256: 4302035b0438e06682e5b3d287ba10a90c8c3f882ca87595cdf49f6d2530d866
font_02_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1