Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1eb6e5cf1681703…

MALICIOUS

PDF

79.9 KB Created: 2021-03-10 08:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9884aa9ca2a3f872885fbdae74b1e870 SHA-1: 80bb48dc7807fee4f39c46e4ba22e8d789323b15 SHA-256: a1eb6e5cf16817035ee1f40ac3a820122e2865cbed958b189b86839f101aaaf0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9990

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 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.
  • 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://leonvi.ru/123?utm_term=theory+of+biogenesis+and+abiogenesis+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5ff24b2de9346.pdfIn PDF document text
    • https://wilibupa.weebly.com/uploads/1/3/2/6/132681560/6580946.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/hcgeLhc/warhammer_age_of_sigmar_sylvaneth_lore.pdfIn PDF document text
    • https://cdn.sqhk.co/xatijafuwami/jddjahg/vudagozafeda.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/dlFv6JA/valentine_s_day_cake_ideas_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/bjAihif/66841816676.pdfIn PDF document text
    • https://lodotimafigu.weebly.com/uploads/1/3/5/9/135981467/491beb066.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/COdyiea/zekuvejobakekazilaluvo.pdfIn PDF document text
    • https://cdn.sqhk.co/zavufepugife/fZjbrhd/weather_app_iphone_air_quality.pdfIn PDF document text
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/793187.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/hfFER4Z/2_player_racing_games_online_3d.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/dinomikobekevek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_6027de4f75f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_603290c4c297d.pdfIn PDF document text
    • https://fopabitibomasad.weebly.com/uploads/1/3/1/8/131857723/bobafesal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/susonanezaj/48129781409.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/machine_learning_data_science__deep_learning_with_python.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_13b9042489b8495dbd536fe032f202aa.pdf?index=trueIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_c11c2c41c6f74f1ca14026544cbe564f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebisop/6177471567.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_d35ffc9af0d641f0b334843fca51c226.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_00d1add4ed4746568686a1d80b30d620.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_027419361c2240a1a2dde6019fabacfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/sat_math_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/68361037842.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 5168 bytes
SHA-256: 7804c52d644362128da439edca0b37bedcda2f3a357e7d070c557151b80e95d0
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 11352 bytes
SHA-256: 3fb0e0daf4ff116cd07f33624261a47994a756e158532dcb0b40c6997e4ac85a
font_02_sfnt_off00012327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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