Malicious PDF — malware analysis report

Static analysis result for SHA-256 f735f4d2cff09963…

MALICIOUS

PDF

94.7 KB Created: 2021-03-17 07:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 05c60d5444837445896e9169b7dbacc9 SHA-1: 9d491442d0025c18289ea524498332ca20c5ae06 SHA-256: f735f4d2cff09963ae0d75aff79b21ea7c4151bb48ae58fbf31626f4c26af1ff
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/wix?keyword=physics+chapter+9+heat+test+answers PDF link annotation
    • http://ganitigusawev.mygamesonline.org/gutololev.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/cG5gcjc/75469889522.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/jerek.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/ca_intermediate_course_books.pdfIn PDF document text
    • http://dunetetemob.22web.org/rockstar_full_movie_720p_9xmovies.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/hghciiI/best_horror_escape_games_online_free.pdfIn PDF document text
    • https://seboneluwisog.weebly.com/uploads/1/3/4/3/134368334/748190c0a9.pdfIn PDF document text
    • http://kojibataruv.iblogger.org/bifesta_cleansing_sheet_moist.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/piromefudutajawuza.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/faliwurulifu.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/temofukowagufu.pdfIn PDF document text
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/91ce64e5f35385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gaxilitexu.onlinewebshop.net/sikelix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378b0f1a-4699-4245-a551-763f71edab43/75908609256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c9a514-ff60-473e-b189-351e421f202a/dream_meaning_of_dead_mother_calling_your_name.pdfIn PDF document text
    • http://kirorewomomi.rf.gd/21668146783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca96f5f-15c0-4c2c-9ce4-75bf7e7f19eb/47678326272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199439c9-e473-4737-9476-042281bad156/howard_leight_impact_sport_bolt_digital_electronic_shooting_earmuff_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe85aea-8aa1-49ac-aa88-a78c4fbafc31/how_to_set_personal_goals_in_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7644344-66be-4b68-9858-546d72690c4b/5_dysfunctions_of_a_team_assessment_questionnaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a94058d-d842-4191-931b-f9a6871826f8/1406009306.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/angel_olsen_all_mirrors.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/88149402609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e8fb8e-d064-4dc8-887a-2c86036c8266/fubidige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6d62b4-6c71-4042-8a3f-6da9c5157452/game_maker_studio_download_crackeado.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 5020 bytes
SHA-256: 53819108766c1999a37c0b8dfccaaef807afa146c2cb5da71d0954a2f241ae7e
font_01_sfnt_off000124b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B1 10740 bytes
SHA-256: ed2b62d1f721f8d73bdc9a1e1fc7de8be726b2e03929ce38749686e71907ea78
font_02_sfnt_off0001495a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495A 16192 bytes
SHA-256: c00f55c8a23f8fc12478e3e4ea1bac713d25e4d1dd6e1e4bb5c667610ba6b2cf
font_03_sfnt_off00015e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E86 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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