Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3fe664d3245fa6…

MALICIOUS

PDF

72.9 KB Created: 2021-05-23 12:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 71c2cf09c9aa95a1a693d2ec33ca3719 SHA-1: 5022b9fab5517a3830452d19da3d26998912c397 SHA-256: 0a3fe664d3245fa6cfec95d92edbc1ec89baed1002fa879b7e80ac1bc6113bdd
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 0.9995

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://jottigo.ru/strik?utm_term=what+does+your+spiritual+number+mean PDF link annotation
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/0ae0a4.pdfIn PDF document text
    • https://zuvopiramalatug.weebly.com/uploads/1/3/5/9/135981479/lufosafataxu_katixilaxur_teseganamil_kazat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_606c67d4cb108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fe3d5fcd0abf.pdfIn PDF document text
    • https://fulimutalez.weebly.com/uploads/1/3/4/5/134599943/wawuxavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_605b9beab9c21.pdfIn PDF document text
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/pakabosinesima.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/pujofotixiri.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/kujesulad/how_to_put_rainforest_jumperoo_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463cc06a-e466-4e06-856f-fdb417a83a6e/92274183403.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/locomotor_and_nonlocomotor_movements_worksheets_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788af83c-97ca-4781-ba56-606d0cee5375/munchkin_cheat_card_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/weil_mclain_ultra_code_e18.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/body_parts_flashcards_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671d3556-a0b9-47b7-adb6-6a71da6adb7e/what_are_the_types_of_seminar_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/rascals_movie_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/dusivusevapogokivul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488c57bc-7167-4401-986a-c7eccf6e7a90/zamibalet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93b8fe1-3879-473f-a5b0-d50d238550a7/letilobaki.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/budaya_korporat_kkm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5449a241-dba4-4100-aab6-b128bceffe94/46574868183.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/ebay_app_for_windows_free.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_off0000d3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A8 5336 bytes
SHA-256: d31087837463526ffd702370a461c4310f73669989ccb509081e2a4557efb2e2
font_01_sfnt_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 10020 bytes
SHA-256: cc3009241895879bcd3ef427c1f634715048af52064d9dafa6518d3368b04b27
font_02_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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