Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccdc9c877ef83a4…

MALICIOUS

PDF

95.7 KB Created: 2021-03-27 18:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 060549f97271da0548ee750305d8ee12 SHA-1: 080f14dd20866dab54328dc3b938dc695f68384c SHA-256: 2ccdc9c877ef83a4d1e1dc90460f0b49027c9d240140b8ae14d6a73055e1a86a
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to membership forms and application details, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/123?utm_term=anc+youth+league+bulk+membership+form PDF link annotation
    • http://fetedeju.mygamesonline.org/biology_gk_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_6002efc8b264a.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/e3hchb4/my_at_t_tv_remote_stopped_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/Mheicjg/unblocked_solitaire_card_games.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_to_install_adobe_flash_player_in_chrome_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/cifvshh/capitalism_american_history_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/giic1h9/saltwater_fish_tanks_for_sale_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6058aa54c1b06.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/hDkEihq/36673569837.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/hipoacusia_audiometria.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/c8igL0D/70726922614.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/qcMhcii/53912545441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_5fe8d4f429c13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojozija.onlinewebshop.net/17028921136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf06a1-3641-4d65-bca0-82bbb53cf6ca/51922865065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61117b69-100b-4073-bd49-07109e14cdbf/5785063623.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/excipientes_farmacuticos_e_suas_funes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72371df0-e9a6-47dd-8f8d-2c8982300a52/remitivodapedoben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a464d0d-417a-4e3c-bd9a-f58c544ad182/diablo_2_dd_3.5.pdfIn PDF document text
    • http://pasulupumorowim.myartsonline.com/etiology_of_gestational_diabetes_mellitus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d00a51f-34ea-4222-a56b-860450c3aaea/how_to_become_a_proofreader_uk.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/how_to_progress_engineering_career.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12183 5900 bytes
SHA-256: 3aa4cc7f02c6af61f991aaaf30d85a6966d893757aadee1b60a33438f50d1a9f
font_01_sfnt_off000135b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B8 5724 bytes
SHA-256: 4695fcb557f2cbe59faf38edc95a2cb10fcd0544dc7c9e9e2d30ab319a0c1127
font_02_sfnt_off00014915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14915 12176 bytes
SHA-256: 5e09f02bf3adc5ca724d8949a1752fabdad12e6bb05b0086bf5e8c39d9e40f62

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