Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc8c158cf9ae6ae…

MALICIOUS

PDF

90.5 KB Created: 2021-05-15 14:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 499b0de4de878283b4664daa57e20252 SHA-1: 832e0b40b447275577023fe6beaa296305ef22f8 SHA-256: 4cc8c158cf9ae6ae1d052127213dfdcbf984d01f8ffd8266c0e67676a03d09fa
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://soxebez.ru/strik?utm_term=the+screwtape+letters+quotes+i+will+cause+anxiety PDF link annotation
    • https://cdn.sqhk.co/vakenuda/foJigTI/blood_glory_immortals_apk_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/jqjfqja/monthly_games_ps_plus_august.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/c8iccnS/flow_sheet_nursing_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/hcEPge2/gba_emulator_cheats_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/6gf4jdz/betulogenevafixijono.pdfIn PDF document text
    • https://cdn.sqhk.co/komilede/dhcOnje/no_crop_video_editor_instagram_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/f4gjGhj/43532045344.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/HgfjeJk/yellow_and_grey_geometric_wallpaper_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/qjjaegi/hokey_definition_literature.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/hcX04hc/rubijijakurok.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/hfdkESP/shooting_zombie_games_unblocked_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/YhdjbyS/total_conquest_games_offline.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_eadca78baeb74d77abbb361db829ca70.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_6de958ce1edd4c3bb1bdc2a3469ef08e.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_6976a8ed6a2c4bcca9a87ae3531243a8.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_615acb4b9c9048dab2c4b950dd5abdf0.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_1b72d7742b514f149d611be759358eb7.pdf?index=trueIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_78c6074c93d841d39bfb9b8c701e4e53.pdf?index=trueIn 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_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 5356 bytes
SHA-256: 94d96afc65d3f9766af4a89de91f51c64ea30c3de7851ce0f520d6ef3fa93b9a
font_01_sfnt_off000135c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C4 11392 bytes
SHA-256: eac4836557afee8e8cd28e8f68fdf333515d60318e6fe355c7419e2eb73943f1

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