Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6310d662585b24…

MALICIOUS

PDF

77.8 KB Created: 2021-04-12 16:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0dbbd9a81df3916f67a2da4c966f7a23 SHA-1: e7775db6538152630736eedee399034ef9228602 SHA-256: 9a6310d662585b248da3abdf99b43b36b9497c0d693cc6d639a4c7c03d9ea300
264 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Vr shinecon google cardboard qr code', suggesting a lure, potentially related to QR code phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://crophysi.ru/strik?utm_term=vr+shinecon+google+cardboard+qr+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6065a87dc3587.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/fepenew.pdfIn PDF document text
    • https://gininigexaviw.weebly.com/uploads/1/3/5/3/135350692/tebomenulemekab_ramof.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/Tyuj9tz/free_wallpaper_download_for_lenovo_laptop.pdfIn PDF document text
    • https://biwaxosele.weebly.com/uploads/1/3/1/4/131437294/wisuv_bojawam_dumomivo.pdfIn PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/5820554.pdfIn PDF document text
    • https://jaginozowelizuf.weebly.com/uploads/1/3/4/7/134729204/retatavuguzodilekup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474170/normal_5fe2af26be856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5ff287b7a8753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_604564dd76e45.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/dMbgjih/civil_engineering_report_sample.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13e249b-1680-4bcd-9788-e051dce5fa21/80393920933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e416632a-0c7a-4d4b-946e-d3db4bf2fa35/defiant_motion_security_light_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e3d7f0-eb22-4932-a9aa-519c8fee1687/how_much_does_a_nissan_service_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/dyson_ball_vacuum_brushes_not_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/full_hd_background_3d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d084b885-dd59-435c-8d64-55b90df1e96a/a_writers_reference_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e772f57b-6672-4fa2-9f5e-98b3065a0b84/nike_air_force_1_low_white_black_sole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d1403a-8e71-4e49-87db-fde4f28057f7/how_to_get_battery_out_of_liftmaster_garage_door_opener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff2b340-7895-4fb4-adbe-91cbbbbd8fba/87212474953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84fab28-6d27-4a51-9ede-5899bad5e217/fovekokikepaziturijafaruj.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_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 5432 bytes
SHA-256: abaf1d1af9d8356759b37e0380e3bb6a06147f514cee6ba6f83cdfdd48a97609
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 11092 bytes
SHA-256: 50bea4a463e5f76bbd13388c0224a043cf112d4b29e36e282c452c2d1f34f399