Malicious PDF — malware analysis report

Static analysis result for SHA-256 6635396b4660dac0…

MALICIOUS

PDF

81.4 KB Created: 2021-04-11 22:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4c2c2c268dd0840817e11b8cfdeffc7 SHA-1: b22b5207bffa66751840185a92e46474f56825d6 SHA-256: 6635396b4660dac071ed752bd766beea2c345d58078845a5dc136e66c36aabc9
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=dave+ramsey+books+on+investing PDF link annotation
    • https://vezajufarazigur.weebly.com/uploads/1/3/4/2/134265717/tefuguminu.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/d88f50db8c4c.pdfIn PDF document text
    • https://ronewomiz.weebly.com/uploads/1/3/0/8/130874064/puwavawodigos-fusurinu-kobidasor-naziguw.pdfIn PDF document text
    • http://basidugom.mygamesonline.org/44534315643.pdfIn PDF document text
    • https://bugitepekasi.weebly.com/uploads/1/3/4/6/134669175/93d0b8c46f2914b.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/2005_audi_s4_avant_wagon.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/375e7a.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/76275107677.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/vipulotixupadu.pdfIn PDF document text
    • http://baditunabupiru.mywebcommunity.org/mac_preview_fillable_font_size.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/what_do_the_different_head_colors_mean_on_snapchat_friends.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/sifug-bukawaxomir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/what_happens_if_a_sex_offender_is_homeless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8ad4b6-51c9-46d8-a916-846cee01eb86/povukutenaramasavawudav.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/android_9_dark_mode_oppo.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/pygame_for_python_2._7_64_bit.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/ashamed_of_the_gospel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e648bd1-0ce6-41db-84df-f2fb5f691c44/kexifiwawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59029069-2d92-4abe-8fa2-c2d84fa15399/bapivu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/fulajevel.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/89098950480.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/zubaridatogutazuloridis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c1c466-ac9c-4431-8d61-b5c026164ac7/59533619902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafe7323-0a46-4b0b-b5e1-a9cbe17da3d9/48956545200.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_off0000ff0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0D 5336 bytes
SHA-256: b73ab4365f2513c3862e0ae6054b647e85aa2edd4fe49dbdce9c94a531dcfd88
font_01_sfnt_off0001113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 11244 bytes
SHA-256: a454d482df3a95abfcea4fba0c0dc96e0cb3a775d4128e545566fa860f5dfd01

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