Malicious PDF — malware analysis report

Static analysis result for SHA-256 523eceef5f49fe8b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 22:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ae5b41c41a69c7073d762458929d1c0c SHA-1: ab812829fc149c1313a4efe24eed8ea7b24d1b1e SHA-256: 523eceef5f49fe8b04ec4af74c3376ff50f05217c3fb79686d5cb922a11a07fc
164 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure and hosts a large number of external links, many of which are suspicious. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to malicious content or phishing pages, and the document body's content, though truncated, suggests a 'service agreement' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pelibifir.ru/award?keyword=service+agreement+sample+pdf PDF link annotation
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/2946539.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/fujitsu_halcyon_dc_inverter_reset.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463824/normal_6008faad1779c.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/the_four_scott_galloway_free.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/a_series_of_unfortunate_events_the_reptile_room_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_601298838ec0f.pdfIn PDF document text
    • http://mofobawosenej.mygamesonline.org/why_is_my_whirlpool_washer_flashing_5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404500/normal_5fdff27e58984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_603e24b91a559.pdfIn PDF document text
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/3257693.pdfIn PDF document text
    • https://mikofamix.weebly.com/uploads/1/3/4/8/134882663/8094322.pdfIn PDF document text
    • https://kazamudadi.weebly.com/uploads/1/3/0/7/130775411/sewojupajozixo_gofisivo.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/vovuzize/automorphic_forms_shimura_varieties_and_l-_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/53594207462.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/forming_and_solving_equations_worksheet_corbettmaths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a8a5f5-96f4-4d8a-8aff-e228d3100612/59079793438.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/baby_jogger_city_mini_gt_washing_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/bomekojobebatidirorom.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/reradarafojepap.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/20732395137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e268d9c-7663-4b70-bab2-65c043e0b0d1/nike_monster_mesh_4.0.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_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 5636 bytes
SHA-256: 580fbdbfaa6d73cc85ce31f64a21e7a38476970e159f636071b4247032465b38
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 10172 bytes
SHA-256: 2617f31f2558f1d47476890fc6acf7dad42faf55343767921a3a4450493576d9

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