Malicious PDF — malware analysis report

Static analysis result for SHA-256 062a108944a8846d…

MALICIOUS

PDF

103.0 KB Created: 2021-08-20 18:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3906f1a2445aca295bfd08187d29c5f1 SHA-1: bb446b9257bd99f5daffbe00461d8e0c7b247b8e SHA-256: 062a108944a8846d3f26a27921655297818a9492066fad3839324852578f33e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077970ce2020---97235001974.pdf
    • http://jvcc.cn/ckfinder/userfiles/files/210709152539563364xaiob.pdf
    • http://topup-fight.com/ckfinder/userfiles/files/pawoziwubozisitovuribop.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d202d4114---61971211075.pdf
    • http://reunionfamily.com/clients/6/6c/6c58f7de0247188f02debbcda007d80b/File/60687783529.pdf
    • http://ctm.it/userfiles/file/febik.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/kann9bddjl2ll0ltvieq7gr3et/12813967291.pdf
    • http://thecargonepal.com/userfiles/file/kotuvuwatu.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099d103ea120---57500030432.pdf
    • https://vinacomvietnam.vn/uploads/news_file/89509708741.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a823f84d891dc5c46b992afeb88c7128/latukibeb.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160adc5908dd11---zulimunozolagak.pdf
    • http://mlight.cz/archiv/file/wolejujuwim.pdf
    • http://avalon-essenzen.at/userfiles/file/fulunusukamefapabi.pdf
    • https://imagebuzz.net/ckfinder/userfiles/files/sumowomosopekepem.pdf
    • https://bursac.net/userfiles/file/78702765599.pdf
    • http://zonweringbelgie.com/ckfinder/userfiles/files/44601227572.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af6d0f99adf---giwujezowumepugaw.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/51tvjfpcu8j9fofjsuv0np0mg2/gifijote.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25f75bdf8---doxenezarapule.pdf
    • http://gpshardorawal.com/hemkunt/userfiles/file/62180877602.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/e5e69cb34f5fdf94d5d5377b891254a9/72292642108.pdf
    • http://poltinka.ru/userfiles/file/61626913785.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094920d980a6---forobevuxawi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=should+college+football+be+capitalized
    • 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_off00012d5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 16792 bytes
font_01_sfnt_off00014574.bin
29a574cd29140b308eb7b0fb6e840515483640feba46b30b469212244be6015f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14574 10904 bytes
font_02_sfnt_off00015e6f.bin
904e7bf4aa8f4ef6207c5e16bf7535aa94526577b9bd89792f6ed8756e316093
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6F 18316 bytes