Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff74b21de9240a86…

MALICIOUS

PDF

107.4 KB Created: 2021-06-25 20:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3804c040866f6025b700e72fb9112f8f SHA-1: 4d8d92f7086746204d5b872d7a742999be4aa4c5 SHA-256: ff74b21de9240a86c773745fca79513a89c18ea22b4376b1145e78882e221c3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://laborke.ru/uplcv?utm_term=is+the+samsung+galaxy+s8+waterproof
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab96e76883---41023600467.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/molipulewubum.pdf
    • https://associazionedynamica.it/uploads/file/3015780923.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c2f20bb9fd7eec9658f2eeefd7a601c7/nuluxijewatenarepusatev.pdf
    • http://mwflower.com/upimagesfile///24543296407.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/jp9fe1jhcpgmclbvc63l77jtpi/winipevura.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903a4f2cd93---74448733955.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/362d0869dc0eaf2072f38e4b5954c11c/kigafanakapujinemul.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/or5g6gtbsi141mm41vrhdto5hh/ravilafibonumadijawa.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ff30c06ffa4e43727b6fe27aef48c951/81508025882.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/4e7h7s17u6fk50i0c5mjbolvc0/tadojidivexo.pdf
    • http://leaguengn.com/userfiles/file///1834384321.pdf
    • http://eros-arena.de/eros/userfiles/file/rimijivali.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc0f0e146b---figuwiduvegukemelisavu.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa8562b7c3---30193768075.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/v2v22et77bpbkh7fj8099mtk05/5385730473.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/64f002225333db9f2986fd5752e46c6a/lolujubefulepaji.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d91d5d9be---gisisobi.pdf
    • http://amandatravel.com/userfiles/file/27460831831.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809424d36d1---88092343547.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430035813353519.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/3fcddea132f156dfcee85c1b8d30de7e/befibozunoxudakofupod.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608562c4d625c---takaxuboma.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_off00013cae.bin
60e4893fddc5f007f19981d2d2a4fbee5a030480a9084859f0c8d4e8af9a6650
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAE 11272 bytes
font_01_sfnt_off00015717.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15717 16792 bytes
font_02_sfnt_off00016f29.bin
34ee2fec1736007c3b2bf72e7274f51befb376d7c0c554af079dba36228ce51c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F29 18012 bytes