Malicious PDF — malware analysis report

Static analysis result for SHA-256 e979a89d6c5fe445…

MALICIOUS

PDF

68.0 KB Created: 2021-09-28 05:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 192acdeb008a9f00ab95e1c9dfb70d95 SHA-1: e72011c570d152f158f091169c6245581533374f SHA-256: e979a89d6c5fe4459de71190ba4e536d2a38bcd97562d0a51f275a157ed97ff3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-only content, and embedded clickable actions. It contains numerous external URIs hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 68 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://oniceh.ru/uplcv?utm_term=ar+drone+2.0+app+for+android PDF link annotation
    • http://thedewakohchang.com/image/upload/File/1520186315.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/jejagolo.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/lojojesatuf.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/vinobupixejoduliwevurokaf.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/16034364687.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/65188609268.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/51617663899.pdfIn PDF document text
    • https://cubic.is/userfiles/file/pugobefumafoxejodeguzu.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210922_58482DAB44EA9284.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/vinivawutuj.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/92899642647.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/80922849371.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/fonegipewo.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/14138126463.pdfIn PDF document text
    • https://digireg.li/upload/lazimoduj.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/dobanevamarumibev.pdfIn PDF document text
    • https://stormester.no/files/file/lexokiwoxejizojaze.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/19631937967.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/72895133625.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/begebi.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/nudatala.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_off0000ad46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55D 10468 bytes
SHA-256: ea4f9fb936a099ebaa0962529df73f88cfceeba69b273f5f1a7e333c16949301
font_02_sfnt_off0000dd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 14324 bytes
SHA-256: fd85d4dcc7b992a448efe55d375fef2dc01607470c222b0e3b7282fd87307fcc

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