Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d5baccd477394e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-22 02:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d62c3403b4be1afb07e0dc218643aeb3 SHA-1: 94ef4126d2afb718b614f0bf63de773a3e50c361 SHA-256: 09d5baccd477394e90cd1160be10a71fdf8a4e44c03451fbfba772f9bbd30c7b
186 Risk Score

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=plant+cell+labeled+simple PDF link annotation
    • http://rafale.store/50818082886l9bnd.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jeib2id/guess_men_s_jacket_leather.pdfIn PDF document text
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/puterawufefifonilo.pdfIn PDF document text
    • https://cdn.sqhk.co/fidegelotag/idwpGYh/battle_of_the_bulge_game_download_free.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/jofeleraxi_fogarikomifitif_riputonituma.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/jXEgihx/twisted_wonderland_leona.pdfIn PDF document text
    • https://xefitopabez.weebly.com/uploads/1/3/4/8/134865339/vuxasige.pdfIn PDF document text
    • https://cdn.sqhk.co/nisavivurefu/Shejdhc/35489797257.pdfIn PDF document text
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/17e9d997cac.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/6490672.pdfIn PDF document text
    • http://vladmer.ru/3773802483efpbl.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/3c2ad094-6b38-4d58-bf66-a4f19c154b47/womisisorusazewoborinipet.pdfIn PDF document text
    • http://lojuwuwa.rf.gd/sony_dvd_dvp-sr200p_remote_control.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_5c2daefc6ab34a2790a8a6dde8763b30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ad6ebc-51dd-461d-b63c-ff33f04c2dd9/dixit_quest_cards.pdfIn PDF document text
    • http://tunawibiga.rf.gd/48614438952.pdfIn PDF document text
    • http://pisasegobure.epizy.com/gmp_guidelines_for_sterile_products_ppt.pdfIn PDF document text
    • https://b3695a61-a5b7-457a-863f-99677d03e0cc.filesusr.com/ugd/f2a82d_ec7179242f2448bfa2d235f1aa220bc3.pdf?index=trueIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_b56d0a8d473044209f4c88fc2a4f79ef.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_e9fcd72169c34b028c18c1dffce187da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b39a02d-9956-43da-9c04-d45af7da4f41/sky_remote_tv_codes_lg.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_e819c90fa70b48898f299bf5429dbc21.pdf?index=trueIn PDF document text
    • http://sobajagas.rf.gd/how_to_wear_navy_type_3_uniform.pdfIn PDF document text
    • http://gudagugagazof.rf.gd/8th_grade_spelling_words.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_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 5264 bytes
SHA-256: 8af76acc8af6a566447b62304859987f35f0aefd76441754a15b14a6962279b4
font_01_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10680 bytes
SHA-256: 0169f79d84e49fdfcae5e8c9ed499ad96bd16c8c979a45a2b7fb9a7b96a2a8a7