Malicious PDF — malware analysis report

Static analysis result for SHA-256 401456f3e4a176f2…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 21:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 276359f2622b3af9aa810faed6230bb6 SHA-1: 8fcf764912c0d8a1d94a5ae1b9a4d78867144332 SHA-256: 401456f3e4a176f25c453e135dd97ecbd911c60931357a131d25ec64d05e0000
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 0.9960

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://maypoin.ru/strik?utm_term=how+to+turn+on+self+clean+wolf+oven PDF link annotation
    • http://lastmarkt.ru/85744513560mpxw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501989/normal_5fd787833f6fe.pdfIn PDF document text
    • http://usacreditcheck.info/what_is_the_bible_in_chronological_orderzp6bz.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/add393ebc34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_600d39e394c88.pdfIn PDF document text
    • https://selijejexo.weebly.com/uploads/1/3/0/9/130969160/puzamurorikasonu.pdfIn PDF document text
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/kefitefewikow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_60498b292cc41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5fe0af7f716d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_604dd48b13b4d.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/kimamapil.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/6206977.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/91e71b9e-41a6-4e3e-99c0-e4c74d1c2b1b/book_of_enoch_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/vmware_update_manager_6._5.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/adb_driver_xiaomi_redmi_4x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8889dc1-ebb6-45bc-8d89-618df7cb52bb/35411998361.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/cuddledown_linen_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/ash_tree_leaf_identification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/65485606080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17250b49-4453-4153-b730-6db12958ce1a/25890774871.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/xugabomozorulev.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/whirlpool_quiet_partner_ii_drain_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209f5334-3eb6-425f-ac16-b9cce3a322d4/el_coran_isa_garcia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a33b8f5-fc31-46df-a360-f51531196e0e/kipaxojitevoxukek.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/anemia_falciforme_porque_es_hereditaria.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/21745195571.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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 4988 bytes
SHA-256: b66509a8216fa20912c13ace9a7caa030fb521031f514cbdf1ee78f69a386751
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 10988 bytes
SHA-256: 922904f7c830d8f063a763953cb48e67fe774140c3203fcef23bab81746eea48

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