Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e955dbbf4a17e6f…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 22:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87c3ea10cba9eab64dd5b149b3bd07f8 SHA-1: 8845c0f785eeacf29374b3f6000017d51aa0f204 SHA-256: 2e955dbbf4a17e6f389cb29e03348ec7d060214e998fb423b40aedc7c20c23f6
176 Risk Score

Malware Insights

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

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document's structure, with minimal text and a large image, further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://ptsound.com/plugins/ckfinder/userfiles/files/pipipotomujejesuvob.pdf In PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/07np3r75inr9ve1926s4ps2s7j/37906778250.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/18454792854.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/87868e37ef7ad2709c5ee543c00c166c/xadafonuweg.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9afba4b9ce28574a17bec6b1de05c24c/laparakavoboji.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/puxozebarovixubewufewa.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/86401136111.pdfIn PDF document text
    • http://kabinet.puzat.ru/marafon/uploads/files/62991213969.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/ziruliv.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/voxepawamuruxopuzeko.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/91051997392.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/fokanikawazogoxozobibi.pdfIn PDF document text
    • http://sfeerweter.nl/userfiles/files/26279311858.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/mazutopiwodebabimo.pdfIn PDF document text
    • http://lamay.de/userfiles/file/putedexel.pdfIn PDF document text
    • http://seed-hongkong.com/uploads/file/59245457269.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/22369047081.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/48276292413.pdfIn PDF document text
    • https://sardiniagreencoast.com/userfiles/file/buwunowelaxirijosifuven.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/17528285378.pdfIn PDF document text
    • http://clickvay.com/upload/files/89726670898.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=online+platformer+games+multiplayerPDF 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_off0000ae34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE34 14604 bytes
SHA-256: fd32eccd24aca2bba4d1550e34f76f44979ca17041ddfd571674d3060108508f
font_01_sfnt_off0000d28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 10940 bytes
SHA-256: 46d176af7346806cfc6f16f150470eb776f4dafd5d37611e69e950a979fa1782

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