Malicious PDF — malware analysis report

Static analysis result for SHA-256 93480f72a12209e9…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 22:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7824e41dc5e25886bb58fe9e61c6c47 SHA-1: 2e9a5fdbbe43d49d14dc48cde97aed6f1652d5ed SHA-256: 93480f72a12209e9b9b396836e267cf244209115ca238cb94062e1efee3d4795
156 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 SEO-themed, suggesting a link farm or phishing attempt. One prominent link, disguised as a search result for 'Bejeweled free for pc', leads to a suspicious URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=bejeweled+free+for+pc
    • https://vudaxevagi.weebly.com/uploads/1/3/4/2/134234865/b874e2c1fd2.pdf
    • http://rajajime.mypressonline.com/30235333370.pdf
    • https://cdn.sqhk.co/gopepilexafi/cibxmmV/background_video_from_website.pdf
    • https://cdn.sqhk.co/tidilotofuka/ge2Pzig/72224835376.pdf
    • https://cdn.sqhk.co/bevoroxur/bBjcUdS/shudder_app_on_samsung_tv.pdf
    • http://wajofima.mywebcommunity.org/awakening_lucifer_asenath_mason.pdf
    • https://cdn.sqhk.co/sezivalaw/bijjjjJ/23143909562.pdf
    • http://fakutuzogazu.sportsontheweb.net/ace_test_series_electrical.pdf
    • https://supadebev.weebly.com/uploads/1/3/2/7/132712355/xivemoviga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/masevewi/multivariate_data_analysis_with_readings.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/avanza_veloz_2014_manual_surabaya.pdf
    • https://uploads.strikinglycdn.com/files/8b4015d7-63e9-4c64-a23a-7ac09995a87b/xibezalukexifug.pdf
    • https://s3.amazonaws.com/pusixa/lumexesemudotewagupar.pdf
    • https://s3.amazonaws.com/posaxugidut/zonaximemewemaxawefew.pdf
    • https://s3.amazonaws.com/dazuxujepov/series_and_parallel_circuits_worksheet_grade_4.pdf
    • https://uploads.strikinglycdn.com/files/c73731cc-6375-46ab-afbf-3e4ddb0044a5/scary_stories_to_tell_in_the_dark_all_artwork.pdf
    • https://s3.amazonaws.com/dibedamoka/delonghi_ec702_user_manual.pdf
    • https://s3.amazonaws.com/zosevid/4768031588.pdf
    • https://s3.amazonaws.com/rurosaveruk/hp_photosmart_7760_cartridge_error.pdf
    • https://uploads.strikinglycdn.com/files/0863ce2b-6616-4ab5-a756-cd5cbe8a2b37/sonexezumopaketabawesasiv.pdf
    • https://uploads.strikinglycdn.com/files/348d19e8-736b-496f-a42b-fb63c7805352/sig_sauer_p238_pocket_carry.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_off0000e7f4.bin
bd919087c9012e85bf1bca796240ff165f725a180171731e7223359ea3f5efdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 4980 bytes
font_01_sfnt_off0000f910.bin
25e6d6274685699bc2c9b0a8fcc59f0441f3c6a77dd8f2d8574b3983a91b4625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10920 bytes

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