Malicious PDF — malware analysis report

Static analysis result for SHA-256 075570b14d35474c…

MALICIOUS

PDF

88.7 KB Created: 2021-02-23 07:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8949eb8550769149d54d74174506fdd2 SHA-1: 9a63cffefb724e6ab9710b0a0a7b5ff7e81f4fdd SHA-256: 075570b14d35474cf7aea1c6ae8c558d8df1579fe04f69550c8ab737b115f902
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm or phishing attempt. ClamAV and ML heuristics confirm the malicious nature of the document. The embedded links are likely used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/123?utm_term=what+do+civil+procedure+mean In PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/jezato_leketemobeg_nopofapaxisomus.pdfIn PDF document text
    • http://hugertely.xyz/33952938849319ql.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/hijawgi/novotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6024edbddbd60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fee9a23eae0a.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/hDHidjd/pusuwodasatugo.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/7mhiSii/63983136951.pdfIn PDF document text
    • http://sendgrid-de.com/bojosogomababibovas37sit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_601b723a6bb0d.pdfIn PDF document text
    • http://copyright-central-media.com/anemia_falciforme_epidemiologiawsshk.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hiVhhid/jungle_castle_run_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jeqiNjd/vlc_android_chromecast_volume.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/ijpr8gc/gepasumiteg.pdfIn PDF document text
    • http://snegny.com/khmer_calendar_2017n641l.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/2gfgchI/mountain_vista_golf_club_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_60118ca8bcc77.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jCbjhid/rock_outdoors_lexington_nc_owner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_60073bb228147.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/kifaxiw-luluzo-vukug-wevoke.pdfIn PDF document text
    • http://copyrights-notices-helps.com/lindor_truffle_colors_guideb96n3.pdfIn PDF document text
    • http://good-production9.site/novewupewexirebublwuh.pdfIn PDF document text
    • http://subbellassecret.com/whale_talk_chapter_10_summaryyaen4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 5208 bytes
SHA-256: 5eadff429384bc828fbd47900ae783b9f966f1e496ef8628f1bd664d2a94f8fd
font_01_sfnt_off0001307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307F 10720 bytes
SHA-256: ef56e73bae13d0241161c6413260151d9257f9f44a617fd0f9e061ad67852d05