Malicious PDF — malware analysis report

Static analysis result for SHA-256 1261e0e703aad499…

MALICIOUS

PDF

84.4 KB Created: 2021-03-18 21:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c0bee49fd11b536f71895a1c75de4ce SHA-1: e2c9e2f8116946df047517ccf106c3b81bcca99a SHA-256: 1261e0e703aad499c9f535763f43279195962efaea8f1c3f931449da4b2ae74d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious or scam-related content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://jumiwimov.ru/strik?utm_term=baby+boy+names+book+characters', suggests a lure related to baby names, likely for phishing or a scam. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent, possibly involving JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/strik?utm_term=baby+boy+names+book+characters
    • https://cdn-cms.f-static.net/uploads/4403560/normal_603926cf53b7d.pdf
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6017ca6ccc12b.pdf
    • https://cdn.sqhk.co/ritelatefoxa/dwihNgh/chaotic_trading_card_game.pdf
    • https://cdn-cms.f-static.net/uploads/4454678/normal_60488b0d76408.pdf
    • https://cdn.sqhk.co/jakatote/S9LIjdH/how_to_make_an_origami_heart_normal_paper.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_600ea2196a197.pdf
    • https://cdn.sqhk.co/buwaxaxodi/iVSZcjW/bingo_party_free_tickets.pdf
    • https://cdn-cms.f-static.net/uploads/4392873/normal_60267d9625f99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_17097f93b9cb4eb0896079b548d01eba.pdf?index=true
    • https://857afa5c-b60b-49f6-9944-f1fd488b4d53.filesusr.com/ugd/c4dbd3_37f0e370334a4ad9b2fc02e16cca84da.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8e440137-ce19-4c22-93bd-bd316c60ca8a/dotnet_basics_for_beginners.pdf
    • https://s3.amazonaws.com/jixeremipet/the_enlightenment_icivics_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/bce7bfc3-79c9-426f-aba4-6a843746ad10/jibada.pdf
    • https://s3.amazonaws.com/xomepixo/bpm_counter_software_free.pdf
    • https://s3.amazonaws.com/fekazudabo/cricket_score_sheet_program_in_c.pdf
    • https://s3.amazonaws.com/fibesezati/bijeruju.pdf
    • https://s3.amazonaws.com/xovajukoxin/abvp_and_nsui_full_form.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_32b4583d23f441ce8e844d2014be3021.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11c53422-d74a-45f0-9497-4abb7345c904/accounting_for_dummies_meaning.pdf
    • https://s3.amazonaws.com/salade/avery_shipping_labels_6_per_page_template.pdf
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_d21d15e07f73496c8e82b8270a48d465.pdf?index=true
    • https://s3.amazonaws.com/baxunaf/shark_navigator_powered_lift-away_and_steam_mop_bundle.pdf
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_8093a3a1e36843a1a6f535188dceb446.pdf?index=true
    • 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_off00010d33.bin
ab5e26b08b67be3baf878035f715c0ae99aaccb5548df5764c92f3f0ddf30673
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 5360 bytes
font_01_sfnt_off00011f4c.bin
68ff0daa9897ac4d181e1dec5891a95371bc8fb2815a91c54de4010e654554ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 10976 bytes