Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f5f3b8cd79b8fb…

MALICIOUS

PDF

83.2 KB Created: 2021-05-14 16:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f844ac32c1bc617410ea088dc03422eb SHA-1: 9598bf9b3bb3c83594aaf0b8aeb9b085ea9f2d19 SHA-256: e6f5f3b8cd79b8fb1f4d481c76579b9d9aefc0966af49763e42ce7d49ed5130e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://soxebez.ru/strik?utm_term=bass+guitar+lesson+book+pdf', suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=bass+guitar+lesson+book+pdf
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/zujopujarow.pdf
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/1676184.pdf
    • http://rivilidopu.medianewsonline.com/beatles_songbook_chords.pdf
    • https://buniburus.weebly.com/uploads/1/3/1/6/131637527/65c47c2f3219524.pdf
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/vuboraw.pdf
    • https://zuladaziduvixu.weebly.com/uploads/1/3/0/7/130740320/8d1c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/borokegujuzero/chamma_chamma_new_version_song_pagalworld._com.pdf
    • https://s3.amazonaws.com/jodabiladezot/fesidumiporo.pdf
    • https://s3.amazonaws.com/lorerexeg/tevoxigipegogoto.pdf
    • https://s3.amazonaws.com/dusubonifu/gixapufav.pdf
    • https://s3.amazonaws.com/laginekux/the_berlin_key_or_how_to_do_words_with_things_summary.pdf
    • https://s3.amazonaws.com/fomaralunex/giada_de_laurentiis_sheet_pan_eggplant_parmesan.pdf
    • https://s3.amazonaws.com/sitok/7392193097.pdf
    • https://s3.amazonaws.com/divikufifir/axitec_310w_spec_sheet.pdf
    • https://s3.amazonaws.com/wezukep/63685022884.pdf
    • https://s3.amazonaws.com/titugome/ankleshwar_to_pune_train_information.pdf
    • http://pekamidakoj.atwebpages.com/aristteles_potica.pdf
    • https://s3.amazonaws.com/gulapore/xunebimetofenareboj.pdf
    • https://s3.amazonaws.com/kafises/xuvufanisozumubaki.pdf
    • https://s3.amazonaws.com/tarajix/zuboluber.pdf
    • https://s3.amazonaws.com/norozovijalu/adobe_photoshop_cs5_crack_hosts_file.pdf
    • https://s3.amazonaws.com/tapelu/audi_a4_2017_car_manual.pdf
    • https://s3.amazonaws.com/zuwosil/android_studio_fragmentcompat.pdf
    • http://kepofif.onlinewebshop.net/livre_grammaire_et_orthographe.pdf
    • https://s3.amazonaws.com/mefovu/45688654455.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e9.bin
373148f686b0629d3ed6366dd6e544da6d96bcd9f66bd72cefa27a9d1a31cfdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E9 5464 bytes
font_01_sfnt_off00011891.bin
30ca722e8f9106c8dee9aa972d5ba644524290edfbdff6fc1a884bf287e4141f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 11372 bytes

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