Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e03956a561c70fb…

MALICIOUS

PDF

86.1 KB Created: 2021-04-03 20:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dda93d54f370a238031350dd85c939ea SHA-1: 25bc7221b6ab55effd4fcc3f8e6c9aa6dd0e171f SHA-256: 0e03956a561c70fbb3553a441620e39a56cf9851071174f9e8df1b2399a8cc67
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support malicious intent. The embedded URLs suggest the document is designed to redirect users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=que+es+una+maquina+termica+en+fisica
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fe4ddcec62e0.pdf
    • http://fexavakagejil.iblogger.org/cantaloupe_island_piano_sheet.pdf
    • https://cdn.sqhk.co/sitopizol/heehfgh/dj_loop_pads_apk_mod_unlock_all.pdf
    • https://cdn.sqhk.co/jolodovi/HheFjbd/32724010951.pdf
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fd1dc4055ff6.pdf
    • http://gexafozo.22web.org/53383243430.pdf
    • https://cdn.sqhk.co/zezegawutogu/dicIgdm/cake_art_bakery_san_antonio.pdf
    • https://cdn.sqhk.co/lokijuzim/eqjjfih/best_superhero_modpacks_minecraft.pdf
    • http://kyhni.site/83427424189rjgpi.pdf
    • http://scm03.ru/the_fappening_3.02jows.pdf
    • https://cdn.sqhk.co/zodunoxurob/ijgiijh/addons_for_minecraft_1._16._4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06c5651d-4ceb-4705-852d-34f5b2f5b8c3/80933733203.pdf
    • https://uploads.strikinglycdn.com/files/4ed078b5-5d79-4fca-86d8-414a080f845d/acceptance_and_commitment_therapy_training_pesi.pdf
    • https://fad8e652-f2ae-45e9-bc2c-f9a63ff8ed8c.filesusr.com/ugd/78c764_1a7bd16676a64df19cc1803614e60388.pdf?index=true
    • https://uploads.strikinglycdn.com/files/77d065c9-b969-46dc-b0cf-0dc54e6689d3/peop_model_occupational_therapy_aota.pdf
    • http://kokofotalixik.epizy.com/gixame.pdf
    • https://uploads.strikinglycdn.com/files/c1591eaf-7d23-4d76-96fd-d28b896159b1/risimovokarulegevonusidu.pdf
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_ad5829b674f3480c9f1209d51b9ca39e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/823cc1bb-0a86-469e-9a6e-04cd4b5ff6f4/91441199787.pdf
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_5cfc54b1d1164ccda30822038ed07eb7.pdf?index=true
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_fd9dbf8ac27b4d5aa7956c62f74dc460.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_off00010f96.bin
27978c65fd210f49a27469bd13212549b64998877a8c4af40abc7c1fbedf2ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F96 5180 bytes
font_01_sfnt_off00012125.bin
acd9630d14e2af0edf1f09ab42b8cc48d330eea9da40175c8baac0093be75d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 12208 bytes

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