Malicious PDF — malware analysis report

Static analysis result for SHA-256 d360f6743ecc8ca9…

MALICIOUS

PDF

67.2 KB Created: 2021-09-30 13:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: eaf8201dbb7aeb7ed76b4746798058cf SHA-1: eb5dce2f8f17d9e5f887d6a6f7ba527ea4daed11 SHA-256: d360f6743ecc8ca9e696ae326158e766b70d65da35b79e425373d5e2e389de51
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF employs an image-only lure, a common tactic for phishing or malware distribution. It contains numerous external URIs hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a compromised site or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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://allytemp.ru/uplcv?utm_term=download+openbve+android PDF link annotation
    • https://franciscojaviermoreno.com/DocsCKeditor/files/fegubogatosufokuxefo.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/13859676183.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/pawilopisotu.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pefakajegibetovewa.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/67158558225.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/58369587823.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a64a6223d7---68357364674.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210924_025253.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/47324246976.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-7/20210907153314563042.pdfIn PDF document text
    • http://sgpeo.pl/users/file/90472035598.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/jikomob.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/napog.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/91674270986.pdfIn PDF document text
    • http://chikatere.com/Upload/files/85851584704.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/96789526115.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/mugakigaw.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/96117369760.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/91392748210.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/37684048803.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/lebuxofit.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/tezumupilole.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_off0000acba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACBA 14188 bytes
SHA-256: ce893d67a4a46f9be3b2ac060f063711c36704f6cb243f0701b9df789f1f8943
font_01_sfnt_off0000cfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE8 10412 bytes
SHA-256: 5ef7dbb5dce428d8aef39c204470952cbf95754728355b112f6502efaee6cb3d
font_02_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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