Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9c0b1fc21a9a4f…

MALICIOUS

PDF

75.0 KB Created: 2021-03-15 22:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: afdbe3262e3789b2713ef82518988548 SHA-1: 9347a33b975f016272c61b7f2fa4fe679b94bfb4 SHA-256: aa9c0b1fc21a9a4f785483d39126786e14891f281065a3d8385c891585b37f7a
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 0.9997

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://gimoguvi.ru/award?keyword=afcat+syllabus+pdf+free+download PDF link annotation
    • http://rebelliona.online/rukupegagesidunngkv0.pdfIn PDF document text
    • http://femukujisidape.iblogger.org/96525567319.pdfIn PDF document text
    • http://picsonair.com/easy_recipe_for_vegetarian_enchiladasl9pst.pdfIn PDF document text
    • http://magazinrf.xyz/how_to_pair_remote_samsung_tvqh0ru.pdfIn PDF document text
    • http://termometr-medikal.site/88243639420j51c3.pdfIn PDF document text
    • http://matteset-spon.space/lobumunuxjcy70.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/xobizefekepk6db.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/dBGNkjr/aea_learning_online_coaching_authorization.pdfIn PDF document text
    • http://totakonepis.iblogger.org/62090171015.pdfIn PDF document text
    • https://cdn.sqhk.co/bixevemaxi/8lAcTjj/maraseti.pdfIn PDF document text
    • http://spoonnumberone.xyz/macmillan_mcgraw_hill_math_grade_5_workbookb9bhw.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/826043875760d19v.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/ccd26fe2-fa8d-49cc-bf6b-38714e34989b/definition_of_reading_comprehension_skills.pdfIn PDF document text
    • http://mefadagisi.rf.gd/terms_of_reference_template_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd07bf25-3bc0-41a0-b1ff-3bee45f9db7e/dell_inspiron_570_ram_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a577e28-5882-4ccc-82ad-533a6e2060c7/risidok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566b26e3-24f9-4f4c-92a7-3bbd41901e88/tojomukisofuzinenamalalod.pdfIn PDF document text
    • http://vuxikujare.epizy.com/nilufudebusawokajevule.pdfIn PDF document text
    • http://xufeguwopox.rf.gd/mabofutomaxepuzure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06100e2a-4f15-47d5-b97d-bbbf820660c8/wotaluvunojopopese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6323dec5-2e08-4253-b7f1-f3e32364a3e5/bemusupekibotijaxojixenij.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_off0000e6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D4 5472 bytes
SHA-256: 45e153a691ddf3262e42d695d956271ad206e05bb4a1373df925372e6e9b03ea
font_01_sfnt_off0000f993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 10916 bytes
SHA-256: e16542bcb404bbe43c3574a779edf801b11cf1520508df6b2b4165bb719525c6

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