Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f27868afc869bda…

MALICIOUS

PDF

85.5 KB Created: 2021-07-03 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b87020a59ba2e589113f759f22ac15fc SHA-1: 09876705be11a3826b671cdf205a33c64809bf73 SHA-256: 1f27868afc869bda85d226c83154cafd23aeca9563df307e4318919e32901eb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content, likely for phishing or malware delivery.

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.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3e5cc398---vekepaxotisitonirug.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/0294c695cba5e3cd563f07c83eafb8b1/3511077112.pdf
    • http://summithighschool1958.com/clients/71652/File/laganudivopovupidevum.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076037d7102b---kovife.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5foq5cqkg73hk1sst7tmmnqmm5/53574003448.pdf
    • http://szentdorottyapatika.hu/files/mujutepege.pdf
    • https://alianzatours.com/imagenes/file/94113311888.pdf
    • https://osakadentalcare.com/contents//files/3037851507.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/a28deba63ba5f69c318504094796046b/vatunuv.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ec438c2bdf0a2a943f1f1de9585716eb/pigafod.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b24fbec9eb142b076e0e116925ed5ae/wibuwunajuredesak.pdf
    • http://vladjurnalist.ru/archive/file/59159817565.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/tjneo9n9jp097sil1tritgbsk7/16921413176.pdf
    • http://alhouti.com/userfiles/file/mapikomepifi.pdf
    • http://nhs1980alumni.com/clients/878257/File/84440268078.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cb8f0361a---49321297224.pdf
    • http://amghanoi.com/images/ckeditor/files/4940781350.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/qeupei4ps4t49s0vgragsl6rbd/34361431810.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/14eabf69447bf1f77a209ea33eec138b/97466964517.pdf
    • https://aradovan.com/userfiles/file/sobowegakutelof.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609131fbc64de---81590317685.pdf
    • http://sam-global.ch/files/file/15757764190.pdf
    • https://noddy.nu/images/file/birutipebenuzemovin.pdf
    • http://7tec.ru/userfiles/files/ripepuwukoj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=biotechnology+laboratory+equipments+and+their+uses+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_off0000e738.bin
3133869da857b5678c798185a8fab639a993abd8d6c54c29a4d6456a1d8bc1ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 17524 bytes
font_01_sfnt_off0001154d.bin
55f784f4b39b3e57740971e4474d7d6c8dadf9d51a8ea1c923ade276333fab05
pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 11620 bytes
font_02_sfnt_off00013012.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13012 16792 bytes