Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d772d7ad68f2e51…

MALICIOUS

PDF

73.9 KB Created: 2021-03-25 09:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c10ed82879a83cc28d866c1a3f027678 SHA-1: d4341457fa8e4dd3ad7f83d2906d9e30710eef93 SHA-256: 6d772d7ad68f2e5110bebc739c6721a4cc9750fe72f724d7b535fb2b4a45adf7
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a suspicious domain that is likely part of a phishing or malware distribution scheme. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to a password-protected archive handoff, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/123?utm_term=moto+g7+actualizacion+android+10 PDF link annotation
    • http://nijalatol.mypressonline.com/duvisugikewariwowi.pdfIn PDF document text
    • http://bogplaktnc.fun/captain_crunch_crunchling_adventure_mac0ufmj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_602241420db07.pdfIn PDF document text
    • http://agentsecure.space/33012156147t2rtg.pdfIn PDF document text
    • http://verifybadgehelp.com/names_of_angels_in_the_bible48p7q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_602dab94a4efd.pdfIn PDF document text
    • http://powerpoint4you.ru/vitamin_b12_is_supplied_almost_entirely_byq4wx3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_601807f08480b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_60132fd4bcb69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/zadapolulovuvewonaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1295db-9b7f-49bf-ad75-a127430b3cac/alesis_dm10_price.pdfIn PDF document text
    • http://ludumidajite.rf.gd/koxesokaxero.pdfIn PDF document text
    • http://tubaduk.epizy.com/is_the_book_90_minutes_in_heaven_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e68ad55-86db-487d-903d-3eec06a33714/62378079122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eecfcb4-07ab-455c-bd44-c058efc67d17/wowwee_robosapien_app.pdfIn PDF document text
    • http://niselasot.atwebpages.com/abzurdah_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17fcd1c-aa88-4881-bba4-e840cee3d859/fovokivotonasogamolug.pdfIn PDF document text
    • http://buxibokoz.epizy.com/oxford_english_to_bangla_dictionary_download.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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 5260 bytes
SHA-256: 30fcf1a6f3273ffb178368e81a45498245b53f14cbae73ec3e3ee3cc327ba369
font_01_sfnt_off0000f220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF220 12028 bytes
SHA-256: 38707e44c56b82b26ccaab3f817860f223c548c80a032cafa4b196cd65acd4a9

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