Malicious PDF — malware analysis report

Static analysis result for SHA-256 318590aff6adb84e…

MALICIOUS

PDF

76.5 KB Created: 2021-05-15 23:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6710fd12976d9450632cb406983236c4 SHA-1: 558e1f78e5d5b2e4100aeb312c85c87ac3357a8d SHA-256: 318590aff6adb84ece42a79188443ebf64a2622d1ba96d90ff3a9ce772d39ce7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://jacksth.ru/strik?utm_term=best+race+class+combo+wow+classic+pvp PDF link annotation
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/96f2c2b91d.pdfIn PDF document text
    • https://kominuxopexazi.weebly.com/uploads/1/3/0/8/130814675/31431.pdfIn PDF document text
    • https://netajetuz.weebly.com/uploads/1/3/4/6/134651380/5885838.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/s1ih4hj/ben_10_omnitrix_glitch_game_download.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/527538083376akxu.pdfIn PDF document text
    • https://zazuxari.weebly.com/uploads/1/3/4/3/134319397/e4bda8e64b.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/6240654085czz3k.pdfIn PDF document text
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/7474970.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/rajijemutafud_sipune.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/aqSic0G/telegram_desktop_application_free_download.pdfIn PDF document text
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/vapaxa.pdfIn PDF document text
    • http://daddytestit.xyz/mirunowutatalepejaxwqq1.pdfIn PDF document text
    • http://smm-target.ru/92052098563rixn2.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/2a72f14c-07a4-499c-8498-71b583f151a3/brinks_security_lighting_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/jibisebukosapigovif.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/ca_intermediate_course_books.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/pufijaniposalupiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8983dc68-f3ad-45ec-805e-dc1555d7851a/diwivujefemuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b1d6fe-2241-4143-a852-b444df1bf792/car_raffles_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed2c548-2390-497d-be18-95a9cbfb1101/dd_5e_hoard_of_the_dragon_queen_magic_items.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/mirofarekevuxufevumet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341fde25-961e-42ec-93d2-1f525ae0cfa4/how_to_set_up_my_jawbone.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 5420 bytes
SHA-256: a9a6f8ced009050440a5a77e008cf1cb1bb2aa6a75f879c02ebd8996f8e07a87
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 10904 bytes
SHA-256: b46c1879e68f5a9658217c2ffcd7178b2ef850bf96634b7bcf600c5b840af9a9

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