Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a580404c81d3c8c…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 03:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b1f5daa03d04798b0273107965daa480 SHA-1: 204f25ed53f1f7b2c8aad40c4114d3e0d6adc666 SHA-256: 6a580404c81d3c8c3c7d0471c610b344f596deff703422a968f8322c777d2fce
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised as a 'gift card generator'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of embedded JavaScript to facilitate the download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=gift+card+generator+no+human+verification+2020 PDF link annotation
    • http://zevewidojodot.mywebcommunity.org/rain_dial_plus_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/UwJstW9/29608986090.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/americas_test_kitchen_gluten_free_pizza_recipe.pdfIn PDF document text
    • http://reduslim-buy.site/71969078147sbj8t.pdfIn PDF document text
    • https://cdn.sqhk.co/megopofe/GjggiBY/91361220423.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/26XiesG/95634492026.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/ajgjdib/bizifofebuvuvexarojeratir.pdfIn PDF document text
    • http://gbo.guru/linear_algebra_with_applications_ninth_edition_solutionsyj14m.pdfIn PDF document text
    • http://myluckybet.xyz/according_to_jean_jacques_rousseau_what_is_the_social_contractv5hou.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/OjiPrHV/block_hexa_puzzle_game_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Vu9Kvjb/vifilokug.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/ghhdjfR/background_hd_images_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/gkxnont/dogewen.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hLEihVo/best_english_grammar_course_in_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/cigigtx/ninja_smoothie_maker_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/xobadata/jf3M7gE/diy_paper_crafts_easy_for_school.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/hjihhjj/dominos_online_menu_uk.pdfIn PDF document text
    • http://003-center.ru/how_to_draw_a_face_mask_on_a_persontkxnk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/meendum_amman_video_song_free.pdfIn PDF document text
    • http://zijedan.atwebpages.com/70611814073.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/mandatory_reporting_elder_abuse_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/wusugirilerupetizej.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/ruraxofebuko.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/32938254279.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/7711849121.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_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 5588 bytes
SHA-256: 2d4e8d4e2f9a211bddb48d4aecb8526c86b86152b3c814c868088786dd68532f
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 11392 bytes
SHA-256: dfc4de88e9395934d0a001e991eb02f9e8db5a48744c12c906ec2915d3135938

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