Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93056f08cc91555…

MALICIOUS

PDF

140.9 KB Created: 2021-06-04 23:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b93c0bc74438e6067ada837bbd5200b7 SHA-1: d87971cee309c00cb37e547cb3ec526aae1c0bd7 SHA-256: e93056f08cc9155509ef690559fc77f312b387483d633144b2be77152affbcc4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, suggesting a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded links for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/pbw?utm_term=engineering+mathematics+2+laplace+transform+pdf
    • https://zipesonavizi.weebly.com/uploads/1/3/6/0/136052153/5206223.pdf
    • https://pisanalanuju.weebly.com/uploads/1/3/4/3/134352438/a335712988374.pdf
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/xawobiwap_wotawamunenan_potesakunar_baxuwu.pdf
    • https://tasufevijusenix.weebly.com/uploads/1/3/0/8/130814010/gupadusip.pdf
    • https://sofotegepure.weebly.com/uploads/1/3/4/5/134522016/1806651.pdf
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/wazaguge-sisumafedepu-rudimotumu-beludofuw.pdf
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/69644d8aa.pdf
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/jitubigumenowerom.pdf
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/117066.pdf
    • https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/86e000d.pdf
    • https://laganavixafalos.weebly.com/uploads/1/3/5/3/135341912/sanepasolupejowides.pdf
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/0274f1.pdf
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/nusevo.pdf
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/joputofepivuz-fumajirux-sexodaxigelum-mepos.pdf
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/wemudulax-josoponopaw-waxopolu-zotad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xoxafepapesu.pbworks.com/f/14663414476.pdf
    • http://lesokulovisu.pbworks.com/f/71903806141.pdf
    • https://uploads.strikinglycdn.com/files/2d41e1fd-d54c-4bb3-951e-539dd6cb7a7a/winon.pdf
    • https://uploads.strikinglycdn.com/files/2e5a9d25-a280-464c-86f6-f2e22303393a/baby_einstein_sea_and_discover_door_jumper_recall.pdf
    • https://uploads.strikinglycdn.com/files/84ae7bee-9e51-40d9-8751-cfc4ea0f0d9a/vagowis.pdf
    • https://uploads.strikinglycdn.com/files/37c1d015-9be3-4aa8-ba64-29704db969c6/download_game_cars_fast_as_lightning_mod_apk_data_offline.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8be.bin
805ad9f7dd87423569aa79daa2de5c007fe4457492bc5ffec855b4a195a6dc1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8BE 5660 bytes
font_01_sfnt_off0001dbde.bin
844b6aefddd14af05bf03a96e63cf947ed0ca0292b8ba2808b33041c6f0f466e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBDE 15764 bytes
font_02_sfnt_off00020fae.bin
6b61b8e1ae554756c88839126f04a5dbafa2f4edbbc0140f5645efe11b698902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20FAE 16260 bytes

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