Malicious PDF — malware analysis report

Static analysis result for SHA-256 5979802060e45f8d…

MALICIOUS

PDF

187.7 KB Created: 2021-06-25 20:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96660905de0149c0c00353f1a59ce8cb SHA-1: f0cf158e0fbd62271b9a66908eed181aeb92de6c SHA-256: 5979802060e45f8d68824c4ed8762b08cb4a65a9561e54902c81d4874f74b059
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple distinct hosts, many of which are WordPress sites with formcraft or super-forms plugins, suggesting a tactic to distribute malicious content or phishing pages. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the assessment of its harmful intent. The presence of numerous embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a deliberate effort to use the document for traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45ecbad7d---25672839255.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fee3dd6ede---joruvif.pdf
    • http://computer-rudolstadt.de/upload/file/59817465454.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae20f04bb6d---dubatetilaxafuluvojeteg.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/kvg5k2hpq20ulev27ovtc9kn5m/kosuw.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d9ed194de2401cb25c9eb89e52a9ad46/48276486875.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/g984f22ggbqptuuvhk917f25r8/ximezapomumelobu.pdf
    • https://bloomeng.com/uploads/tisewidudo.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/908bb4424f59edf59e2c424ec071b907/zutoginatimarixogalin.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c503f35443d---38949218599.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/mifuvofugesowek.pdf
    • http://www.abcklima.hu//data/editorfile/97960664469.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/dalozeri.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160789cbc5f664---zutekoxifixaj.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9ee07da1ca5b16160168b2efd4eb1cb3/39605242756.pdf
    • http://osc-pribor.ru/products_pictures/file/dutulegomiribopakowize.pdf
    • http://shelton1961.com/clients/35589/File/vawukigexu.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/99abaeccb1ff93312ee5d225e90f6c83/41805707402.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b1de6478e---lomitibemutog.pdf
    • http://kfbi.ru/content/file/guputajamilibotanafo.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922aa8b292c---gaxaze.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5e586819f41e2c40b09c6b8ab7cb23a1/3513541436.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cork+cambium+is+an+example+of
    • 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_off00027c66.bin
227b3fc92c7c6c09c47053e061f9906d080c80185b30af262dc58fd0382579e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x27C66 19840 bytes
font_01_sfnt_off0002ae53.bin
a370388c5a4115edf225570ac7a7177886d016dcafa2902f56b4f0a08097e2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE53 11008 bytes
font_02_sfnt_off0002c7bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7BB 16792 bytes