Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e05b3e710829d49…

MALICIOUS

PDF

67.1 KB Created: 2021-04-03 11:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f757903a359ccf96d80fe31ed254ae2 SHA-1: 7e38442c3cd2709227bceb9bec04bf2d82a209a7 SHA-256: 1e05b3e710829d495340d845e49b2f0a08659e61937390390bcf9677183dfefa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. One of the primary external links points to 'https://jacksth.ru/award?keyword=caruso+st+john+el+croquis+pdf', which is likely part of a campaign to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=caruso+st+john+el+croquis+pdf
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/4535040.pdf
    • https://cdn.sqhk.co/xunijejozi/ha2Iwty/52304878668.pdf
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/1540671.pdf
    • https://cdn.sqhk.co/rabovafom/bhhgheq/94064190218.pdf
    • https://cdn.sqhk.co/wemitupu/fGnXmvr/nfl_scores_week_5_live.pdf
    • https://cdn.sqhk.co/jeporikate/bWicOgs/college_basketball_coaches_on_the_hot_seat_2020.pdf
    • https://diwamelebo.weebly.com/uploads/1/3/4/1/134108813/dewutotavomove_safekodot_vogibowe_pepejigumo.pdf
    • https://sasadopebob.weebly.com/uploads/1/3/5/3/135324308/lutetafenes.pdf
    • https://cdn.sqhk.co/vivugiwu/c4jiO92/zepobesajotunusonaxamarag.pdf
    • http://pikejofopon.mypressonline.com/dibrugarh_university_bsc_mathematics_major_syllabus.pdf
    • https://cdn.sqhk.co/jomonufo/idOxohb/asur_web_series_telegram_channel.pdf
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/23f974.pdf
    • https://cdn.sqhk.co/pinofizulag/9SJijIV/83381372994.pdf
    • https://tigizojotajubum.weebly.com/uploads/1/3/4/4/134489046/8468139.pdf
    • http://sawemawe.mywebcommunity.org/devi_bhagavata_purana_in_hindi.pdf
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/tenikuxo-rinejefe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xufoxorog/52338823678.pdf
    • http://teropisarazo.myartsonline.com/merexaxituxadujose.pdf
    • https://s3.amazonaws.com/zijivevip/do_you_need_a_highschool_diploma_to_be_a_real_estate_agent_in_texas.pdf
    • https://s3.amazonaws.com/jukezeluf/bosch_rexroth_valve_3d_model.pdf
    • https://s3.amazonaws.com/tesodagiwor/aglc_quick_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c5.bin
1d5e0dec7184b7a2a863cc7011d300f01b55d219202a45dba095f3c0b655ebca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C5 5352 bytes
font_01_sfnt_off0000d9f0.bin
ee1322440076cc96db2f7c10cd1cd5cf3fdc86c5ca08a38047dac7a8b074fae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 10988 bytes

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