Malicious PDF — malware analysis report

Static analysis result for SHA-256 0479fcfe13e818aa…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 11:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dab86e887396be07573b407043eb5d9f SHA-1: 259a06037b6813ad965437006f5155be3c3c907b SHA-256: 0479fcfe13e818aaff3335784515b279a7ed7436910803c2b48fa48d8e7ca8c7
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a lure to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple links on disposable or compromised hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b9d6a4954---wetipogavikizunusa.pdf
    • https://goodline.by/userfiles/file/39054011857.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4fba70de---wamixibaroteti.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4848e5b36---10872362333.pdf
    • http://www.contal-farmer.com/uploads/files/48368992340.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093152b9e516---12821317721.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6069e73e5f7ba6f78f5d07f283132791/19045021247.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/40734923009.pdf
    • https://vresponse.net/userfiles/file/33196587663.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076c38d122a3---8298410581.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/6758a4536e72c55f3d1f21ae610eee8d/gewetoxen.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fee5b6e077---66355255967.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/of5ll0vkv9hq9o63g3ni008lp1/85896766842.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c340e3442a5---30502937071.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/wojifelozuxo.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc65f3dbc39---lojenifivepozemewiz.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7a766ff5e21b2ee46dd852435e1194b6/kajazafezonajojaxefo.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/eg8sg9phpgeid8gaa6ufd4lpl2/42710372750.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/msr1ovsulrpfu9h9ii21gt0kkn/80987516691.pdf
    • https://machnhaduong.com/images/uploads/files/30089066920.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/992a7a60ae39bc00afd432ff7e0dd6fe/89772261308.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160978e0cbc5f2---gonufodu.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/27977389918.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=interactive+form+fields
    • 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_off0000eae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 16792 bytes
font_01_sfnt_off000102f9.bin
84124cdd9d5cd005cacfbd2559235ff7996d930bbf18b52f9e2ced809987fa53
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10652 bytes
font_02_sfnt_off00011b5f.bin
50ed9ec9119c02e335529e11fb5f28b855a1ab8dbdc61f53f8507e41549ec20c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 17252 bytes