Malicious PDF — malware analysis report

Static analysis result for SHA-256 1befa1dd4c5dcf5f…

MALICIOUS

PDF

76.4 KB Created: 2021-04-01 02:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc70fae898ac7f2347ea28f61e68787f SHA-1: 5838d226ab24cfe437e2f947dfd2884b98c06598 SHA-256: 1befa1dd4c5dcf5fadc772bfcd0d439ef0168a99b8082c1cb5f37e07b1d2305e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+go+to+minecraft+launcher PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/hQhcNhc/movie_manager_app.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/is_subaru_awd_good.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/dL6hagi/transformers_earth_wars_deeplink_codes_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/feruwapusux/kZiaji5/ertalyte_tx_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/gcggjhj/nixes.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/dayidD6/82494686608.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/qjhihgd/boomerang_movie_songs_download_starmusiq.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/zhhbvih/smashy_road_on_poki.pdfIn PDF document text
    • http://nazulemijoxamif.iblogger.org/blue_eyes_white_dragon_1st_edition_psa_10_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupewovixiroz.rf.gd/59549255894.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/8172787261.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/how_do_i_reset_the_pin_on_my_chamberlain_garage_door_keypad.pdfIn PDF document text
    • https://1a73feee-b327-4bc5-ac54-9d367b44a425.filesusr.com/ugd/226baa_00ab1c9a51e44c4a9590e36c96ef4e4b.pdf?index=trueIn PDF document text
    • http://nibudikugi.epizy.com/bomber_friends_game_mod_apk.pdfIn PDF document text
    • http://kopolug.myartsonline.com/pitoterigusevikimukol.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/42214841818.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/genesys_android_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/hp_cp1525nw_airprint_setup.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_62dcdee46c0f480b8ed808217964173d.pdf?index=trueIn PDF document text
    • http://jedulunub.epizy.com/kudapofugopisijinoka.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_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 5168 bytes
SHA-256: f69ed3ac7d1b0e412b41cd6689fa5ae3b8203b4af980e903d6330b33fa6560f6
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 11144 bytes
SHA-256: f40268075b5cca3535a8d86bc1aba62ea58989b7ea69d0862e07ec2865158130

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