Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bb60598d876bd5…

MALICIOUS

PDF

93.7 KB Created: 2021-06-30 18:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 577fb49851ad13fb3b334834a6252394 SHA-1: 8519fb231943afc374a438629b15f79f34910a75 SHA-256: f0bb60598d876bd5957c04f57b725efbb14314abb7eb69e9b4c81df17a0a6b25
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, likely serving as a distribution point for further malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/be3af3d8883a935b63f081ab868f7c79/podajewugazukejewevu.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/kfqoc3jjrjkajf7pit5i841u7k/jurujezipaxotogemiruga.pdf
    • http://meijialx.com/ckfinder/userfiles/files/religasefajojapupufelak.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c062b6eab3d---posazonuku.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/f34e8fb273eda45776d5b5f997b6ef03/jajujipenum.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4bd8cf36b---67499287567.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/10ce77e7d40f9561aa6e572bebf4906f/narofaralakisametizelire.pdf
    • http://atthaya.com/file_media/file_image/file/56638646298.pdf
    • http://malbreil.com/userfiles/file/76034928282.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/60376743692.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7369212267561e48ab69af6e51e6f2c0/15093720708.pdf
    • https://africanresearchcenter.com/userfiles/file/deruvudopumik.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/i5s8gk3pk9bf1mq8hai04bprl0/gawokenupo.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb197181ec---mimapanaxa.pdf
    • http://hndgyl.com/v15/Upload/file/20216281551317555.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/p7hben0mi924lrqr68bejqj4kr/86297235280.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/3h0ic7aioabhh2e4cjj1hcjol3/tukesejufapuwosadomak.pdf
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/98891392701.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a932e7c216---vosatiwelaberaloxazefugux.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/manogrb34h2hakm0dqbtuf5os4/putakawepokegokejawibawam.pdf
    • https://coluer.ir/documents/file/wukasogutawabokajeze.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160acb7336337d---9915537013.pdf
    • http://www.hgbehringer.de/img/files/files/fipowagunito.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/jgrpvfe41v422r38radio09fbg/tulunoxakipibojij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=wenger+betting+tips+apk
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee34.bin
47c79071dfc884479da9c093774426c25bff92dcc236c782817e5529fdf68ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 10488 bytes
font_01_sfnt_off000105fa.bin
8393cb4b4fcc0442c76fc907c3d9c27452a56b1a83e9426c07de77c128ab9392
pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 18444 bytes
font_02_sfnt_off000122a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 16792 bytes
font_03_sfnt_off00013abb.bin
cfb7b18cab76366241cf4d0c5d3ce367d074c6bc2daf85b6cbd8362bf9f23f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABB 17628 bytes