Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe8e6a9ac8ae7c5…

MALICIOUS

PDF

79.8 KB Created: 2021-03-17 06:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e9e13c7e22dba448c4e78276b99ebe SHA-1: b353ed4d82ceab61103bb865e992a1483087c85d SHA-256: fbe8e6a9ac8ae7c555c0e5cc61ff70d9a7f466e8e7c7c1919ddbd605a904fce6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to distribute malware or phish for credentials. While no scripts were directly extracted, the presence of numerous external URLs points to a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://golowaki.ru/123?utm_term=chhota+bheem+cartoon+video++free
    • http://vekisonoloze.sportsontheweb.net/18087766121.pdf
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/korisuxexaw-bodiwo-wimofujavav-fisagobas.pdf
    • https://cdn.sqhk.co/tororukiwuri/jxhdheT/blackboard_open_lms_github.pdf
    • https://cdn.sqhk.co/nowavutu/cgfRAoI/youtube_music_player_android_offline.pdf
    • https://cdn.sqhk.co/nuxazagugura/iiAhfs7/61817206628.pdf
    • http://torgservis-rus.ru/agartha_1_yoruba_movieafspo.pdf
    • https://gasaromub.weebly.com/uploads/1/3/0/7/130776100/4c883d10.pdf
    • http://lenusabipowezo.getenjoyment.net/kohler_bathroom_fittings_catalogue.pdf
    • http://complect-tech.ru/9814537266knwpt.pdf
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fcc4ce3c4f6b.pdf
    • http://lnstagramservicecopyrights.com/xuzifirajina3i4cf.pdf
    • https://cdn-cms.f-static.net/uploads/4365657/normal_6049ad45823dd.pdf
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5ff6330649b2b.pdf
    • https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/c457523b7.pdf
    • https://cdn.sqhk.co/ponesigis/6jjhfha/7967319173.pdf
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/kogixixejimagik.pdf
    • https://cdn-cms.f-static.net/uploads/4366336/normal_603e2484a5e82.pdf
    • https://cdn-cms.f-static.net/uploads/4405437/normal_603a8f5235eb3.pdf
    • http://granitmetrospecstroy.ru/oregon_ducks_football_team_schedulelukwk.pdf
    • https://cdn.sqhk.co/fiduzosi/gisjivU/magopobagevixufigemagefo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/lopeteb/nefudofavizek.pdf
    • https://s3.amazonaws.com/fapaga/manufacturer_business_plan_template.pdf
    • https://s3.amazonaws.com/nawosineromigi/41768087597.pdf
    • https://s3.amazonaws.com/bulujono/the_counselor_2013_full_movie_free.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cead.bin
8b07da7ce5aa5846c172b3bbb0b0198c8d5b153a807158e21b2918988ed65ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAD 5156 bytes
font_01_sfnt_off0000e004.bin
8bdc0730e2dea8d557480dfb546a2d5b7431f5c45f17409eacec2614a52af289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 2476 bytes
font_02_sfnt_off0000eadb.bin
b96861683fba55b4ab860090bcbaade11c4d5f18a1e5a3c626718b01e499907b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 10300 bytes
font_03_sfnt_off00010e31.bin
182291565869c650ce4766d281150a7ef192815e2db443d35b7bbcc2e40bd246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 16344 bytes
font_04_sfnt_off0001242a.bin
37fc116103cddaf0bb5d26277cb17112bfba323786c8e2d2003781551a3ba135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1242A 2932 bytes

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