Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe41195dd5db379…

MALICIOUS

PDF

69.7 KB Created: 2021-02-21 12:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2de8ba204dfd99578426af9a0a2e4210 SHA-1: 6bd54b58ae11b9f2281d2c4cc4ec7ed5be95a751 SHA-256: dbe41195dd5db3794061249e8d1d3af4005498b27feb860d81681a1d04c22818
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, many of which are associated with link farms or disposable hosting, suggesting an attempt to redirect users to phishing or malware download sites. The document body, though heavily obfuscated, contains keywords related to property search, indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=city+of+west+allis+property+search PDF link annotation
    • https://cdn.sqhk.co/didatife/dIgdY6q/cat_kitten_runs_away_from_me.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/clgirya/5973955262.pdfIn PDF document text
    • http://blablablacar.online/dragon_ball_z_tag_team_save_data_ppssppxrs87.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/ijigWbd/romojebusavoxebive.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/jibgiDn/69121232858.pdfIn PDF document text
    • http://mizolaresunade.iblogger.org/54930640448.pdfIn PDF document text
    • http://biolinkus.me/gamefly_app_not_workingllzcx.pdfIn PDF document text
    • http://makikupake.iblogger.org/tibomas.pdfIn PDF document text
    • http://chebsvet.ru/82868830724def2y.pdfIn PDF document text
    • http://ductsunlimitedins.com/32625023424oqudg.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/jcig8OA/feisty_pronunciation_us.pdfIn PDF document text
    • http://heartcenteredequestrian.com/how_to_grind_everything_swgi52ac.pdfIn PDF document text
    • http://samozanyat.info/cannibal_tamil_dubbed_moviespzg8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_6017d5333a93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375203/normal_5ff541c2f2da4.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/djiahiA/fall_guys_hexagon_strategy.pdfIn PDF document text
    • http://clientbluebadge.com/991151930834h4ng.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/dJihahj/smoothie_maker_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punozow.epizy.com/likofejujiwuzu.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_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 5200 bytes
SHA-256: 96e06f6438a03ecae321cd1a197bfc8daf321685335df98119eb4c8cf4188954
font_01_sfnt_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 10504 bytes
SHA-256: 85992f69bac2653a7ed8e1a2cac1ba6729e87de6e244d78693a86961d05d5030

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