Malicious PDF — malware analysis report

Static analysis result for SHA-256 b002d3426fe6e8a6…

MALICIOUS

PDF

82.2 KB Created: 2021-09-24 06:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b4ea1d3945da98693363dd4bdb5b95f SHA-1: a3e811049621b04de0dc3abe37d13f814750f296 SHA-256: b002d3426fe6e8a61875971715b32776f1699bad1ff5301f06ba214b487b2bb5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with a high-confidence heuristic identifying a link to an algorithmically-generated URL, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://esz.jp/img/editor/files/wufaletanumotagotiz.pdf
    • http://hightopeducation.com/cms_uploaded/file/99486516300.pdf
    • http://immobilieninvestors.de/userfiles/file/sodufusi.pdf
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/nejuwijafevugu.pdf
    • http://dobrasekacka.cz/userfiles/file/zejumenitoje.pdf
    • http://tcsklife.com/filespath/files/20210916204851.pdf
    • http://nzozkrowodrza.pl/uploads/editor/file/zobadojapiruti.pdf
    • http://automsystem.com/UploadFile/file/20210912120455661.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/vezapareziwotugami.pdf
    • http://transbur.ru/admin/ckfinder/userfiles/files/61030365874.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/18a6744961e5645ff04f3370d2c05447/lokagakozemosabiboza.pdf
    • http://vibratingsieve.com/d/files/77619363577.pdf
    • http://ganteltechnology.com/system/userfiles/file/19327872943.pdf
    • http://jpind.pl/userfiles/file/26917046101.pdf
    • https://kaktutzhit.by/uploads/files/3675282400.pdf
    • http://thanhlapcongtykiengiang.com/upload/ck/files/55126176831.pdf
    • http://szamosiszerviz.hu/feltoltott/files/nadisupaxez.pdf
    • https://yumasri.com/assets/ckfinder/userfiles/files/fomubotimodarotalix.pdf
    • http://a-aqua.fr/ressource/site-image/files/75458796633.pdf
    • http://yogo110.com/userfiles/file/rulogigezevodo.pdf
    • http://oldstat.ww.tj/img/file/mejusekog.pdf
    • http://vipnjl.com/userfiles/files/73066182642.pdf
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/31432567702.pdf
    • http://climtech.com/files/files/15387023722.pdf
    • https://o2opr.co/userfiles/files/116394490.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sehhaty+app+download+free
    • https://mediaget.com/userfiles/files/zemuwudulifimavipu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c1.bin
a20ec871c37f6e7efa44c661e658bf07a599180fd947b85084f49578b1ebf390		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 18072 bytes
font_01_sfnt_off00010954.bin
c3996e5ab29c06147a1cf613f2b996ea18d53d2ed9e7a228fa4aaf18aa3c704e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 10612 bytes
font_02_sfnt_off0001219f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1219F 16792 bytes

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