Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a681d49d6fd825…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 20:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5cc52d5fc822e1120158a9fff87113a SHA-1: 31d2f1f8017e219e910164314d4c89c9463935ed SHA-256: 34a681d49d6fd825eb1e9b01df52be235b5178e297c12178458427550d64078f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=weather+in+burke+county
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4bgtsv9gn18gtio0orjcairar5/95893327575.pdf
    • http://ldbell1965.net/clients/85689/File/21149540325.pdf
    • http://nowyhotelik.pl/userfiles/file/gifazolazadoratozut.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c009e4e1025349359183376dd0756dfe/75902225544.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c11cf800c90---31449713675.pdf
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/tisumetesume.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/828ae2f082fd4558eefb11a5b92d3c86/39813565676.pdf
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/tadirikogotileseni.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7ac91aa30---71134783875.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/140d02c8dbd5ca89c01749910a240aaf/jerutanalodirefosipowivo.pdf
    • https://vyrukrc.lt/userfiles/file/88261286820.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/651ddpgbfetai6rbfct7usaln9/wirefafofetin.pdf
    • http://petra-dario.info/upload/datoteke/2491103254.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/siakefn3uqrooud1a5rnmgrd7j/xegopovip.pdf
    • http://kvbm.org/pds/userfiles/files/15366250505.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/509b653047092cf83e08310bcd3b9490/kigexo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/546ac49cb0230e10e72db9d065b242ed/kiduzipufazoretesaz.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/3uq2kvamgbnifmfk992314ushi/bedaxaxinonuluzunotorok.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983dc89c892---tikofamejofodefitajob.pdf
    • http://globalquestconsulting.com/userfiles/files/38915227322.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d981022114---11916551568.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/7puht12grln6hl8e53e5h239qq/90752242326.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607796bda76c3---7011405009.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f014531fb2---xujepiroka.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_off0000ebcf.bin
06b0d10488f8dc5a2cbe06330acf9a5555ecd5d5591381678cff41e3b301365b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 17764 bytes
font_01_sfnt_off00011ad1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD1 16792 bytes
font_02_sfnt_off000132e8.bin
bcbce6ff1febc8fdcd799756c9b5ecd0763c806fdddec13b7ba97a0ff8d59133
pdf-font-stream PDF embedded font (sfnt) at offset 0x132E8 10552 bytes