Malicious PDF — malware analysis report

Static analysis result for SHA-256 140a0367a09ba6e0…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 16:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 245a9efc90104e59b30496d7ee6bb2d7 SHA-1: 82e130608a160d338cd95ac80ae9e377ed78874a SHA-256: 140a0367a09ba6e0967e590e54daf035e5122970b9ba886496373285ab0ad2de
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/123?utm_term=galacticraft+mars+mod+1.+7.+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458618/normal_6004db394d7c8.pdfIn PDF document text
    • http://yandex-delivery.cc/mimimivalojikq6bz.pdfIn PDF document text
    • https://cdn.sqhk.co/nizudezed/ZjgEmgc/jebus.pdfIn PDF document text
    • http://ru-dev.xyz/4224199465936fci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_602f5cf920924.pdfIn PDF document text
    • http://bettermoneytips.com/10202085681vgh0p.pdfIn PDF document text
    • http://porn77.design/lg_soundbar_nb3530a_mounting_bracketo2vr7.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/iiifge0/pubg_tik_tok_funny_dance_video_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494436/normal_6008ec4c4d81d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fce3c00f0950.pdfIn PDF document text
    • https://cdn.sqhk.co/livujiguf/fRjapo2/denigefipobepexetiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_6043691c52707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_601a6e3553a83.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/4iijeBr/smith_s_marketplace_north_ogden_pharmacy.pdfIn PDF document text
    • http://lp-consalt.ru/lovumososugubimuxisi934h.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/hcxTdl2/badudifegeboliterijiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunesapog.epizy.com/mofekoxezafugub.pdfIn PDF document text
    • http://liboditi.rf.gd/11278400890.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 5504 bytes
SHA-256: c8788162284f08ae186c26347fb2d3f08784db5c0e054b9992da19da4cdd2a7f
font_01_sfnt_off0000e2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E8 11396 bytes
SHA-256: df759a59e7bcc4efe8bf48156c0435f8f5dfbb46ea274f5c4083559ae1bc68f8
font_02_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 16064 bytes
SHA-256: 8ce0575abc6f686af3c1393089841c21814f5c4838d5adbe0d649219e58da802