Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e985a9301d00a21…

MALICIOUS

PDF

83.3 KB Created: 2021-06-28 00:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d911d198699145cc049496784c3dafa SHA-1: da306683c42dc6585ff2c3b9887b39c57a8c6b5e SHA-256: 9e985a9301d00a21ff9c6b8eeb6ea0c3c62aa2433dd6cd2a03ec20c6b2c8a7a4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially compromised websites. While no scripts were extracted, the overall structure and URL patterns suggest an attempt to deceive users into contacting a malicious entity, likely for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/67319964520.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e939949d---68100506041.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/acd0177e56a09a1d071babfd92d0ab28/76890664942.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/mabcfhfu1rk8m24sp4mlqe6940/29646872933.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b806c24b89---46754056078.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091931c19242---zadokog.pdf
    • http://afghansolar.com/userfiles/file/vakovafijebilif.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8fdb6a97a9d83bdace9d5f407dc6c3b0/46204752574.pdf
    • http://www.benyowsky.com/resources/files/sepufijixelo.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6117aa8efa---virimasifupavivow.pdf
    • http://teckim.it/themes/userfiles//files/66138124515.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/97e8b9e8ao700h9egtce5m3uhv/deseduzuji.pdf
    • https://bahispesinde.com/gnc/veri/_files/nisozuxowufuganu.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/62465699873.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4dd68cc2---22186889126.pdf
    • http://diamond6ranch.com/userfiles/file/50760307685.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/efv4jf9oioop8v5ul5rfhkcks2/tanotutikibunubanofutavox.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608da5be889d6---pukowipedodekezubufusek.pdf
    • http://birkhoffhi.com/userfiles/files/zabukitatutupolinejibalal.pdf
    • http://birzebbugastpetersfc.com/files/file/fofexewatuwewoze.pdf
    • http://dralituncer.net/userfiles/file/jotefusifibel.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/85030768851.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=suing+creditor+for+incorrect+reporting
    • 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_off0000e3aa.bin
818e0583fbe9608ade6f55dc928bc5ee526f3316c4d745cf371f6b4bae3eb843
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 10592 bytes
font_01_sfnt_off0000fbc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC9 16792 bytes
font_02_sfnt_off000113db.bin
5ef6d77134b4c9c645d3fffd1821752ce372621265c69b874583e9aac7782a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 16900 bytes