Malicious PDF — malware analysis report

Static analysis result for SHA-256 309368e18c947068…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 01:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3efb24f1fa80c653e3abc103c5a0b39d SHA-1: 44e787ee3b2bc9ae4ba605030485fc15cb291532 SHA-256: 309368e18c94706882fabb55b60223a69f8ff38fce7c8b278522159d2e8d89b1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to drivers and application versions, likely serving as a lure to encourage clicks on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://baarspo.ru/123?utm_term=focusrite+scarlett+solo+2i2+2nd+gen+driver PDF link annotation
    • https://cdn.sqhk.co/novitovikor/urr2yic/17339091590.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/8c75f5af2a46224.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/aVVcHtx/34116165265.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/66f4bd7fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/jciizhd/drifting_definition_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/rwT4jjC/magilotowedewidoka.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/cjbhiTH/game_booster_play_games_faster_smoother.pdfIn PDF document text
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/mapidezililexanamuz.pdfIn PDF document text
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/moruwazuzexuj_xezolazik.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/jggeigh/fruit_dash_mod_apk_android_1.pdfIn PDF document text
    • http://sawalaxal.66ghz.com/19126500693.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/kegco_conversion_kit_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/gjHcyxH/tokapavatufesaveguxodete.pdfIn PDF document text
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/510429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/arduino_uno_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/jefupusukur.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/99465654231.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/live_football_on_tv_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/most_common_neurological_disorders_list.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/cd4053bcn_datasheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89F 5252 bytes
SHA-256: 02dd746fc556aad0b12dcaad1137ffb04fd40c48a9e6a989ec19c927dd42a96a
font_01_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10288 bytes
SHA-256: 744b028e70f9e9790d126aaf2e7b8a2fda94bae564f5afea7ce9da8458531686

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