Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed641719ad71bc…

MALICIOUS

PDF

100.0 KB Created: 2021-06-27 00:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7621a1efbc3078070990103e07a4b26a SHA-1: a26c7d22e155794119249ae96cb52fdf33eae363 SHA-256: 09ed641719ad71bce1bf34e4446654e9c4c8c2ffa5b9d6eaf1cd18d75e58643f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The presence of a 'password-protected archive handoff' heuristic indicates the document likely instructs the user to decrypt a payload, a common tactic to evade security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/qk0v2dpedks5q6g4785lsh1m1m/lozazuvapi.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/55a875fd68bcffe65e8b043dd5519f67/97104507961.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e69cfb3de1---36817443288.pdf
    • http://allaboutdowney.com/userimages/95143067741.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1818c37c0---vedavuruletafozi.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3132e8ce4c6a7dd08c9796d118af77af/mopidafitarubeleru.pdf
    • http://aggengr.com/uploads/CMS/file/71874515648.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc02cb1ca---gagafoge.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/d93deb77b7ce5acb19cc327c16e78f75/widisodulotapisebavim.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b95c40b21---jesula.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/f5e7229d8da2ecec66a9f4e21b824a58/bibuzonevezasovok.pdf
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/3916600195.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/1229a0aa31d96cf95e8fe94dc9bbda63/xuwebodikiwato.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/91082707120.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/crf3d1td9r77mabet2bldeo800/dedimesatilexa.pdf
    • http://gostinica-domodedovo.ru/files/64254465385.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c878938bff---nodututoxajagajalo.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee2d4cbf3c---fiwopegorane.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fc21ad3e8---42725693644.pdf
    • https://alamansyria.com/userfiles/file/fowopi.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e20e7ae96---3924721086.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855a4f19cbd---wufobebitamefi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=participle+adjectives+exercises+with+answers
    • 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_off00011f28.bin
1510d43eafbf3d26af8f261bd09e99531f87b7f26f3575ddfd9fa3c1e06e9c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F28 18636 bytes
font_01_sfnt_off00014fb3.bin
bf0dda46936dcb4285015e074b146d183dc3fa093cc9e17c538ac1adb0b76f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB3 10876 bytes
font_02_sfnt_off000168d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x168D2 16792 bytes