Malicious PDF — malware analysis report

Static analysis result for SHA-256 29601b37652cab08…

MALICIOUS

PDF

87.0 KB Created: 2021-07-31 12:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6967f2fe4a7ab26a7790608ef39eecf SHA-1: 65bc9627313d7a847cb93f2c7d73a91cfc98b26e SHA-256: 29601b37652cab080b41c429c8a86bc8fe944eeb5a5699b180cf170405094f5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites and disposable hosting, designed to redirect users to malicious content. The embedded URLs and the heuristic firings indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/e8b2af021d4245245d0ced975289b519/dizovuvozusinefasefarisa.pdf
    • https://clickkedai.com/userfiles/file/gasabobagulunuf.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8af8a7d5a18601677613a50fbca966e1/90680934819.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607560880600c---78567543568.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6cfa21296---18714353212.pdf
    • https://zold-kommando.hu/files/wovajaxusilipibijumujewew.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/qb01a62jicq9fum9pr8ipkcg01/42623737596.pdf
    • http://imssp.by/data/images/fxeditor/file/78771108865.pdf
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/55392876652.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cfd267fb5---xegisipekedimodopifopi.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b37313f0fac---32044458611.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16073e6a91b48e---68799246119.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/4s7kk14528nmq2sg3pu0b77a53/6004632802.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/d072f46520d8506a916f8e7d30daeae1/wajadetijexur.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160748b5e3a54e---49752710142.pdf
    • http://favorit.pl/userfiles/file/lotudilojojapaz.pdf
    • http://mxm-hosting.nl/img/editor/file/79462380581.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844813d8cf5---37137789953.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc60811cad---dolofufenasagipux.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/gm80kh6sgguudc06dfm929nsk6/tajisilirexitonitabewufad.pdf
    • http://geose.ru/userfiles/file/43224440001.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d8839b45b50---womonefikobubogawala.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=why+won%27t+my+mac+do+a+software+update
    • 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_off0000f063.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 16792 bytes
font_01_sfnt_off00010875.bin
d3d9234b3089a1b272317545c8bf334854e90783f092ac18bbd0b011cecb4f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 17028 bytes
font_02_sfnt_off000134b6.bin
8582f40cb73d6a257b986f7cb390743e947cda82ffc5ef36963911df02dbab23
pdf-font-stream PDF embedded font (sfnt) at offset 0x134B6 11076 bytes