Malicious PDF — malware analysis report

Static analysis result for SHA-256 6144dff9805e04ef…

MALICIOUS

PDF

73.1 KB Created: 2021-07-04 12:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb95671a505c1db1a8d4b9ea2a03928e SHA-1: 57f4df289808bab4aeafddab96ab8d20dd171a1d SHA-256: 6144dff9805e04ef28730e6d334d56b944534719405ee60a63baf2b794f22908
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of numerous embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd751ee9a---11173602537.pdf
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/mufudobeduzaxuxogesifin.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc792190c---30030667598.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608062e155230---22450117682.pdf
    • http://phsbulldogs1966.com/clients/8/87/87911cb64b10f66d93d15f7b6e22d365/File/sidufulezojaz.pdf
    • http://10glazsikeyrosa.ru/file/71097116308.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/0069153eb324f3ef1d77c952663764f2/wutojanokanege.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2c5cbe647---jegaduve.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/be52561916a70dc47c87873585bb01f8/geluzevitelor.pdf
    • http://kristenpell.com/userfiles/files/65787124352.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cd506ac62---7641303577.pdf
    • http://washchienluoc.com/upload/file/70958433029.pdf
    • http://digifast.cz/userfiles/nomidusovojepeverexumiv.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/8b469c4e376197d5e5dc20fe097db020/bifuzasatokes.pdf
    • https://aronabritcan.com/userfiles/file/jojozubezi.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/oag6ungn243m6tti3u2chjmnn4/74461838183.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160843faca276e---61058417316.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ada3e7f4fb---xotetivezodovuganixidiwom.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/a85f086851240b43e13c06b6deaf2fa7/61530255604.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160876ed3060cf---96525800168.pdf
    • http://hopkinshigh1961.com/clients/878968/File/60355482582.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160afa77b7e478---tivinumabunifikeluwowud.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76864c2ef3e637d36095a9ae9c20de90/49876094386.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/73396332818.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=reaction+mechanism+questions+and+answers+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_off0000bc0f.bin
1c2a90d11a42a949c9a0f92406d1b3142259e6fe38a0c9621048c1e7c824d1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0F 11216 bytes
font_01_sfnt_off0000d5f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F6 16792 bytes
font_02_sfnt_off0000ee08.bin
b01b3e264327a93f17ad2df74cdd8983022abf4103cb66929fc1e024a42af960		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 15992 bytes

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