Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede90d939dd17834…

MALICIOUS

PDF

76.9 KB Created: 2021-03-04 23:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 543923e52166ad97785cf1b3289f6504 SHA-1: 0135bf8197947f59717b5352ea89825bd58e863a SHA-256: ede90d939dd178340644353edb270ae1f0d4c603de67398fa102a051149981ce
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with many pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=world+history+book+10th+grade+california PDF link annotation
    • https://milarenu.weebly.com/uploads/1/3/2/8/132814898/35c47f7206.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/fA0Pggf/how_to_draw_cartoons_step_by_step_youtube.pdfIn PDF document text
    • http://meleworofazob.22web.org/xolalep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411922/normal_6004c44c9f5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_603fbebf83724.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/zujogopaxawo.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/jhVjiii/street_dunk_3_on_3_apk.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/1016676.pdfIn PDF document text
    • http://tetuzat.22web.org/gabejumipad.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
    • http://peworesafasar.epizy.com/56283118183.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/baal_veer_episode_1112_3gp_video.pdfIn PDF document text
    • http://takerowul.epizy.com/sight_word_see_worksheet.pdfIn PDF document text
    • http://zufisad.rf.gd/whatsapp_blank_white_screen_android.pdfIn PDF document text
    • http://baxolorojujore.rf.gd/how_to_type_congruent_symbol_in_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/77800953633.pdfIn PDF document text
    • http://fijinibegomiba.rf.gd/nukigotofobikotekiragex.pdfIn PDF document text
    • http://gorumefu.rf.gd/29016155205.pdfIn PDF document text
    • http://zonadomafi.rf.gd/71182341419.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5584 bytes
SHA-256: 412df4b9930c3792f9d797a75341c29d5a5a3e94c53368e257e99f819d3fc720
font_01_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 10484 bytes
SHA-256: 81c85475944ba30af0c7da8ba0053e4f090c8a32db1d6b8aab32a6c45091095f
font_02_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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