Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae9d55126a456b4…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 08:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 84237390b217c2a74ff0293ea41cf1d9 SHA-1: 2f9a1b7d81f472fbafbc23028cf7464ebd90a62a SHA-256: 7ae9d55126a456b4825c01355a3b770475f9272fe45a38bb22821d9dda8cb960
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The presence of a 'download button' heuristic and the URL structure with 'utm_term' suggests a phishing attempt to trick the user into downloading a malicious file. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=damage+report+template+for+insurance PDF link annotation
    • https://cdn.sqhk.co/sowodopevew/fzOieSF/radio_21_live_romania_online.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/41404729102.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/A4Z4mjg/14904631287.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/autodwg_to_dwg_converter_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rafukilus/jtNoXjc/3_digit_addition_with_carry_over_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/zajikeze/oVTm9xj/sholawat_barzanji_lengkap.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/jfgcjaX/89537385256.pdfIn PDF document text
    • http://dekupedatibidal.iblogger.org/37623000960.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/pemanfaatan_bonggol_pisang.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/QhiiaX4/7081035352.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/oNBifMw/11984175161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunepinewurebef.epizy.com/ronevetadodedunovupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e872ecf-f877-4728-86b6-a587b31eb1a5/batman_death_in_the_family_hush_watch_online.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/xoxarokito.pdfIn PDF document text
    • http://texukevopafol.epizy.com/jekajogomelojoxogeriroj.pdfIn PDF document text
    • http://vagasumiwiku.rf.gd/what_to_wear_on_your_first_day_of_work_retail.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/katuge.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/ajaya_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7592bde6-2bbb-400f-b3dc-93661effe9fe/bavumid.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/can_you_import_mp3_files_into_garageband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98dc7c53-2bf3-4fc0-a179-b2a6d11d151e/fodaxalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa36bd9-9ece-4c9d-8060-149b4994351f/covalent_bonding_crossword_puzzle_answers.pdfIn PDF document text
    • http://fatigovonid.rf.gd/shoulder_dystocia_acog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a655206a-5ab8-45f8-a82f-3badeb77029b/32673416751.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 5332 bytes
SHA-256: da3c50d03d1a9fb59171024f5ff56d869392fbf3d36fc97d74c6e9364b16f68b
font_01_sfnt_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 10864 bytes
SHA-256: f0da4d5461573fbaa485ed0efbe4226d2d1ea011057a02255153cd404af0cd08