Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfd201d8f8d798d…

MALICIOUS

PDF

85.4 KB Created: 2021-05-08 00:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c8abf7677be240a60f80c0ebc02eec49 SHA-1: a3e0b1218ae511c771fb8dab6fc04626b0d821ea SHA-256: 5cfd201d8f8d798decedee89d9685eb207d1ec94fb9bd6de34526b264fd53a43
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent link leading to 'fokemale.ru'. This URL, combined with the heuristic firing 'PDF_SEO_LINK_FARM' indicating a large number of external links, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file, indicating it is likely a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://fokemale.ru/strik?utm_term=legend+of+zelda+a+link+to+the+past+switch+release+date PDF link annotation
    • http://fidafevemikiwe.mywebcommunity.org/dark_souls_remastered_ps4_review_ign.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/benjamin_carson_biography.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/4EggJgh/girl_guides_ontario_registration.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/11259753502.pdfIn PDF document text
    • https://gibonubud.weebly.com/uploads/1/3/4/8/134877094/396983d.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/Kxhdgc1/altered_beast_classic_mod_apk.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/sodafuburiwire.pdfIn PDF document text
    • http://lefavapexusa.iblogger.org/defaforonigutetikixisi.pdfIn PDF document text
    • https://cdn.sqhk.co/kopubeno/SFJB5HO/67055558116.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/idgjjic/34089510197.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/alloplastyka_stawu_biodrowego_dorr.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
    • https://s3.amazonaws.com/mogipegi/soundarya_lahari_meaning_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/como_pasar_de_milesimas_de_pulgada_a_milimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/52591236624.pdfIn PDF document text
    • http://ruzuvune.epizy.com/budidabidikovadipepajel.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/transformers_bumblebee_pictures_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/password_keeper_printable_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/what_is_the_average_uk_family_income.pdfIn PDF document text
    • http://xujalupa.epizy.com/ffxiv_into_the_aery_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/gavusevetejifaxuri.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/android_studio_apk_name_ndern.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/lobizusilusajobelegarelo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 5352 bytes
SHA-256: c7af9d4752a2fc4560f37cd865994574477a72c713f034250b03e6afc75958a8
font_01_sfnt_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 2336 bytes
SHA-256: 9da9d8785ea50ec5389c1ee08deb5012a835678403776f9faf3b4bf5a3332a2f
font_02_sfnt_off00011001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 11664 bytes
SHA-256: 05f2f57b71e4a6665675e1d02ae01ea14ccfc63f5e352680531626b575bf3c66
font_03_sfnt_off00013738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13738 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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