Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cd9d027ece676f…

MALICIOUS

PDF

81.4 KB Created: 2020-12-30 16:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8cd37e37d079d7614f3148c860adfb2c SHA-1: d292ab0cae8f2dc8c7a895c1462b02d1e823bcd3 SHA-256: 28cd9d027ece676fc939b94b6bfc6b543a3d0357c14a337def099281ee5be4b8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is flagged by heuristics as a critical finding. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Rc flight simulator for mac', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=rc+flight+simulator+for+mac In PDF document text
    • https://cdn.sqhk.co/jafetegupam/igijjcq/cool_wallpapers_for_teens.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/iihdVaa/gun_rider_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/BigpBif/dicedom_merge_puzzle_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed128d9-600f-4e02-bd14-b4a6060a8949/dragon_quest_xi_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05ef1b9-6938-4bd5-895f-8e4073b6adec/audio_manager_apk_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d1ae45-b0e4-4959-af1f-9e9cc8c5e513/giy_domba_high_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daba74cc-53b0-49f2-8b58-c2d0db1a2a26/dnd_5th_edition_player_s_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fad1ded-916b-4962-9892-a8df17a5b415/jubuxusenugewoleniwedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699d2307-097f-4eba-ac1a-598deb59f5b5/jerejigenug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35117f8-307c-4706-b800-e0e81769c14d/gejof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b8cf5b-482e-47ec-9767-3d8ee8657d72/building_foundations_of_scientific_understanding_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfac476-10c9-4fe7-b033-b81b38f6d6ca/myron_mixon_recipes_brisket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b1ae82-c612-4603-a2c3-e563fd94e9a5/15229717886.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_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 5300 bytes
SHA-256: 273f3c8c29acd48dd1df19ccb8b54211a9f3a4e666cd86711cd56232ccf9376c
font_01_sfnt_off00011324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 11220 bytes
SHA-256: 0a547319ed0fd30b4f59c2a77364b38ac57dff1ffa1c8a56ccaffc53f234ddab

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