Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddd008f911b2c72…

MALICIOUS

PDF

87.2 KB Created: 2021-04-22 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d428e326431b20f966e3c3c03780cd0 SHA-1: 6daca6747fc2078dcb0a16136659e045174f2b23 SHA-256: eddd008f911b2c7209728fe68d3853702ffc964a9b7eb2104eb19a843b942e15
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to a link farm on 'dugedepap.ru'. This URL is likely used to redirect users to malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=sandisk+sansa+clip+battery
    • https://cdn-cms.f-static.net/uploads/4378152/normal_603b74976a35f.pdf
    • https://cdn.sqhk.co/denobafopum/Jiajjjj/pupadakag.pdf
    • https://juzoliposiwe.weebly.com/uploads/1/3/4/3/134322138/33298f5a.pdf
    • https://cdn-cms.f-static.net/uploads/4503309/normal_604e3f06ddd57.pdf
    • https://dimavuvinidet.weebly.com/uploads/1/3/1/3/131397938/5869878.pdf
    • http://nebemor.mywebcommunity.org/oracle_sql_developer_tutorial_for_beginners.pdf
    • http://vetozadep.mywebcommunity.org/ashby_material_selection_in_mechanical_design.pdf
    • https://cdn-cms.f-static.net/uploads/4388048/normal_602ac8565d46a.pdf
    • http://bagidopivulo.mywebcommunity.org/sadefalasewu.pdf
    • https://static.s123-cdn-static.com/uploads/4405190/normal_5ff677fe17e25.pdf
    • https://cdn.sqhk.co/sesudegaruta/LhdYlyD/download_mod_apk_bed_wars.pdf
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/8128075.pdf
    • https://cdn-cms.f-static.net/uploads/4450434/normal_60672d65acc83.pdf
    • https://sumokexopusoval.weebly.com/uploads/1/3/1/3/131378975/mimewiroke.pdf
    • http://seweripuwas.mywebcommunity.org/how_to_prevent_coastal_erosion_in_louisiana.pdf
    • http://birapemotafew.mygamesonline.org/nevewemaxadujemu.pdf
    • https://cdn.sqhk.co/rorexamuviz/dEhhgeq/memedroid_pro_funny_memes.pdf
    • https://ratipixudaxixix.weebly.com/uploads/1/3/4/4/134472160/43bf1957cd94f.pdf
    • https://cdn.sqhk.co/rawavuzom/P1BLTgh/archery_shoots_near_me_this_weekend.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dorulusof/10612221406.pdf
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_c64b5ea1b48540c09887df5645a2b25d.pdf?index=true
    • https://s3.amazonaws.com/rodiligarexo/tojuvubunafa.pdf
    • https://s3.amazonaws.com/tobaziw/satakefikotevok.pdf
    • https://s3.amazonaws.com/gelawiweza/pabiwutivewofare.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_55f45a562b8846de893d3bcdd97751a4.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_off00011214.bin
fa909c2c4cdc73be4e4c2d3ea9a481befa8cf6a07c8d16a33a3289a3d6691280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 5476 bytes
font_01_sfnt_off000124c5.bin
039180ee7db66f445fecbf264754b19f35a77db9d2dec2370a783b6bd1ce9d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124C5 12736 bytes

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