Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b46c1f5de22485…

MALICIOUS

PDF

76.2 KB Created: 2021-05-17 11:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: db8d9a8a8aa8100cb616a065d7a92e47 SHA-1: 2ed64c7001c0f48ef8fb1d1e5c5f9fda0c0dcc3c SHA-256: e8b46c1f5de22485fc4f9df2c872dca1c170ce9c4cdaa41b03fa55977896ff80
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a prominent one pointing to maypoin.ru, suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains text related to watch time settings, likely a lure to disguise the malicious intent. No scripts were extracted, but the presence of external links and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=how+to+change+the+time+on+a+citizen+eco+drive+radio+controlled+watch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417827/normal_60480536a2aae.pdfIn PDF document text
    • http://dhl-order.info/where_is_the_reset_button_on_a_rinnai_tankless_water_heaterd1hvx.pdfIn PDF document text
    • http://pitushok.space/nordictrack_audiostrider_990_reviewt2f53.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/popamewuduvasivuw.pdfIn PDF document text
    • http://lnstagram-helping.live/wuzevagapidoto47q55.pdfIn PDF document text
    • http://sosuwede.iblogger.org/72791504768.pdfIn PDF document text
    • https://xubivotalo.weebly.com/uploads/1/3/0/7/130775972/serekewamatid-dedoxalokivakuz-tatureteve.pdfIn PDF document text
    • http://natojawu.22web.org/buxejote.pdfIn PDF document text
    • http://bufanono.iblogger.org/company_profile_format_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_6037a0be912d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_604971704bc46.pdfIn PDF document text
    • https://wifiluguzuz.weebly.com/uploads/1/3/1/4/131437957/xewojodoj_bupabakot_nilev.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/14dd4c8eb0.pdfIn PDF document text
    • http://anyita.space/spongebob_squarepants_full_episodes_download0atmr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobepufare.epizy.com/51608213339.pdfIn PDF document text
    • http://bifikaximeme.epizy.com/android_studio_documentation_download.pdfIn PDF document text
    • http://regozuluxawig.rf.gd/why_are_sub_zero_refrigerators_so_expensive.pdfIn PDF document text
    • http://sagunum.rf.gd/xajenanakalusafan.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/how_to_eat_move_and_be_healthy_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/2006_honda_civic_si_oil_change_interval.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/power_of_attorney_template_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/king_bolete_look_alikes.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_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 5336 bytes
SHA-256: 466d83d8583c94e9a1dcd5c382cc6ef3471bd4fd5626eadb64c0ac3cbbdc2f86
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 10372 bytes
SHA-256: dc52e0e91cfe9fc9835cc6d7ee183c14cd1e52a6ce2cfb21a9a01172dcff3d0a

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