Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e98786ff06abc6f…

MALICIOUS

PDF

88.5 KB Created: 2021-08-04 18:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 021d11ca0f728a1cdd746f25e14dbe99 SHA-1: d85c802005be1602adf1d4b75475c2cbe9e00f16 SHA-256: 2e98786ff06abc6fc290b836dd2831d1eddb173e8632741a69592e610e921569
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, characteristic of a link farm designed to redirect users to malicious sites. The presence of multiple distinct hosts and a high number of PDF links suggests an attempt to obscure the ultimate destination or to distribute various malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 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 https://biblioteka-koneck.pl/ckfinder/userfiles/files/68215123758.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dee884500---vefijevawegitani.pdf
    • https://kaptenhoki.com/contents//files/52723833358.pdf
    • http://df-2.de/images/daten/file/dijiniraxej.pdf
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021071304503980554.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607300f24bf08---36816618140.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa2905f12b---xezekifuguveji.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/79f57d497c1a17c31b5972e62e0d7b20/5609803608.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093afbd5b63a---mutetaxudedokiwizitedanop.pdf
    • https://wonkingchina.com/d/files/8529469115.pdf
    • http://farmaciacogliate.it/userfiles/files/86033422219.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f5c8c71b110ef465d3e10915aead7381/27839148796.pdf
    • http://scamps.biz/userfiles/file/68863002499.pdf
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/fimuna.pdf
    • http://amy-tsai.com/images_express/userfiles/files/rajozubunovurafi.pdf
    • http://botosani.ro/img/uploads/file/66726297442.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607499a3e270f---22211408376.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/732cc8990a379b6a60c96b221c487928/31553915149.pdf
    • https://heatingboiler.ca/fck_upload/file/10301224950.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/424981860aecb72cb5e12eeba833afd6/71924409138.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/8307bed2c652dcc2c5e24430ffb05a2a/fametajovuzifedoruteviv.pdf
    • https://pikhospital.com/ck_uploads/uploads/files/25093178887.pdf
    • http://polyalpan.hu/_user/file/revis.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/momisejijarovib.pdf
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2424401051.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/gozuve.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sweet+blasphemy+book+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_off0000f587.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 16792 bytes
font_01_sfnt_off00010d99.bin
465bed6e45f9d1db4ce985fa6bd6aaf1c15814ede5274414de14d5b390e23a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 17380 bytes
font_02_sfnt_off00013a7f.bin
973e641aec0b5b027446a8cf205c194d0ef99265c367156a699498b5428d2faf
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7F 10976 bytes