Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8708a1decb7f388…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 04:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 75e39ec823e3dac76879732649ff8527 SHA-1: 6f2bab1aadb4cb1fc932ed166ff1d9935f6a293f SHA-256: f8708a1decb7f38842addd3ed53e8ce93d2692a6d6d2fd117ae74a974a81b504
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. The document body, though heavily obfuscated, contains references to media content and application names, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=brilliant+legacy+sub+indo+360p PDF link annotation
    • https://cdn.sqhk.co/vujejanar/igcged7/total_conquest_mod_apk_offline_unlimited_crowns.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/veginasaru-xuloluwolami-zotejapewadu.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/what_does_the_2nd_amendment_mean_by_well_regulated_militia.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/47324890318.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/jDhjahh/hockey_mask_killer_meme.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/lefemabadekekimegi.pdfIn PDF document text
    • http://muzotom.22web.org/11th_class_economics_book_answers_in_marathi.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/jakutagatetumop.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/hihc4ib/vi_append_text_to_end_of_file.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/mororepenatudibedu.pdfIn PDF document text
    • https://pudakivofuleges.weebly.com/uploads/1/3/4/8/134853743/7834530.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/refar-sijuzip-xirot.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://fuwasal.rf.gd/d_d_swashbuckler_5e.pdfIn PDF document text
    • http://jurorinidup.rf.gd/51781435001.pdfIn PDF document text
    • http://nilifejafajow.epizy.com/ansiedade_2_autocontrole_augusto_cury.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/abnormal_psychology_david_h_barlow.pdfIn PDF document text
    • http://soworuniranemum.epizy.com/angadi_theru_songs_123musiq.pdfIn PDF document text
    • http://nokebubikirog.rf.gd/didozakunumusaj.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_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 3620 bytes
SHA-256: 30951d413458f4ce160e2876f77513fdf3f7e9f19d21b137ad93b1e713c0ba48
font_01_sfnt_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 5876 bytes
SHA-256: e9907f72cc384cc0a535a2fe59dd2c24b951e8d80f176e3b86a4226416a0d136
font_02_sfnt_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 10520 bytes
SHA-256: afef9d192f8992abf78209619eeac31fea2e50c8e0fd13c70ce090db5613f0cc
font_03_sfnt_off00011bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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