Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c275f5b002aaba…

MALICIOUS

PDF

80.2 KB Created: 2021-04-07 23:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4e785c42a4ad023760ceaf2b12d4e2c SHA-1: e0a368e5f86b1fd9461be26a15b452ee830cee6f SHA-256: c3c275f5b002aaba9d01c1d1fb040e45181eeb6e9c380f0569d996a1aaf88ee4
196 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to PDF files with numeric slugs, indicative of a link farm designed to manipulate search engine results. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to deceive users with promises of prizes or funds, requiring them to click links. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a lure to a phishing or scam website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://golowaki.ru/strik?utm_term=sodastream+spirit+onetouch+sparkling+water+maker+-+white
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/gaxavufivotogin-gapiloluf.pdf
    • https://cdn.sqhk.co/sudidoxa/w5if6ZX/cooking_master_boy_episode_19_sub_indonesia.pdf
    • https://cdn.sqhk.co/morovujefi/jf5poEe/real_crickettm_champions_league.pdf
    • http://zimuzezu.22web.org/necromancer_inarius_set_dungeon_guide.pdf
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/53f1d9.pdf
    • https://cdn.sqhk.co/gawagunikuw/jhji2lT/fireman_sam_season_12_episode_2.pdf
    • https://cdn.sqhk.co/kiviziko/a2Nhiha/10985187315.pdf
    • https://cdn.sqhk.co/gulifunanale/ljcYejh/hill_bike_racing_game_download_apk.pdf
    • https://cdn.sqhk.co/rezalabobo/dificuG/76686383775.pdf
    • https://cdn.sqhk.co/lilajibusizu/iiSgftD/megasagusibizovavivokop.pdf
    • https://cdn.sqhk.co/tazakabebilo/hhbDyhc/vexorokivizivijibiliwoke.pdf
    • https://cdn.sqhk.co/karopepagu/exijjhC/ikariam_sea_battle_strategy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e7e661c3-47f4-4fc8-b93f-3f447351bd4f/how_to_learn_game_development_reddit.pdf
    • https://uploads.strikinglycdn.com/files/c44f2cc3-0cb8-4053-8e1d-5c3c7d1d30c1/jenovipuzoduwovojoso.pdf
    • http://kijepelekub.rf.gd/68341894765.pdf
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_6fa1a29f5eda449ea3fc49be0eac4606.pdf?index=true
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_f55aaa35d3244daa8eb85d013eb601e1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/20105456-b459-4bac-8172-2324824e9ce2/kavimeminokezubokuk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80d.bin
ba29d4aa65637aa5149258cdf60dce5f1a30fae0892515aed051716420814619		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 5776 bytes
font_01_sfnt_off00010baa.bin
3699d191a7d4f26141ec563c528b7e7eee76c37f8f708175015b5eecea7e0b0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 11952 bytes

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