Malicious PDF — malware analysis report

Static analysis result for SHA-256 03702d2f53b8ed4a…

MALICIOUS

PDF

80.9 KB Created: 2021-05-07 11:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053d8582948d25ddb97380347e61f846 SHA-1: 7b0c3a6cdf0eac4ea2825c4e9f4bee0c611fc438 SHA-256: 03702d2f53b8ed4a8790a9db0acccedc7102419bd040a8ab5d894afe2c0b4eda
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm, which is a common tactic for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=lds+christmas+devotional+2020+live+stream
    • https://cdn.sqhk.co/tizarina/Qv6YLig/gunship_battle_helicopter_3d_joycity_mod_apk_download.pdf
    • https://cdn.sqhk.co/girewobo/jtIgeif/gonedozilalafuvoso.pdf
    • https://cdn-cms.f-static.net/uploads/4419849/normal_603f57002254e.pdf
    • https://cdn-cms.f-static.net/uploads/4456671/normal_60417f72ae296.pdf
    • https://cdn-cms.f-static.net/uploads/4455902/normal_5fd7f84e13c91.pdf
    • https://cdn-cms.f-static.net/uploads/4479213/normal_6061ffc587028.pdf
    • https://cdn.sqhk.co/midipumep/hebiDgi/kuwadejevurazuvekox.pdf
    • http://fusagawi.iblogger.org/courtesy_driving_school_worksheet_4_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_604cf448a062e.pdf
    • https://cdn-cms.f-static.net/uploads/4422918/normal_60540e1e2869d.pdf
    • https://cdn-cms.f-static.net/uploads/4455406/normal_600fe8bbe60a1.pdf
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5fc6a5e737234.pdf
    • https://cdn-cms.f-static.net/uploads/4388813/normal_603967db0fbdd.pdf
    • http://famojefefe.iblogger.org/th4110d1007_honeywell_pro_4000_programmable_thermostat_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5ff4b7871d0e9.pdf
    • https://cdn.sqhk.co/wagavoketi/iz00jhf/free_music_apps_without_wifi_from_youtube.pdf
    • https://cdn-cms.f-static.net/uploads/4411489/normal_600d474964531.pdf
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fc99e4cbcfd5.pdf
    • https://cdn.sqhk.co/tinipuded/dijjfcF/jumpstart_kindergarten_1994_wiki.pdf
    • https://cdn-cms.f-static.net/uploads/4530712/normal_5fe7a03883d2e.pdf
    • https://cdn-cms.f-static.net/uploads/4455645/normal_604ab37cb6e49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zifozuwa.rf.gd/63790368001.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_8e6f8a0f8a7f4640b6bbd617dc0aad20.pdf?index=true
    • http://lunasik.rf.gd/how_many_polar_bears_are_there_in_canada.pdf
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_c64b7923281c4383b811b27313cba497.pdf?index=true
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_4975298294d1412f9736baa2ff5ed9bf.pdf?index=true
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_f066d33d2e6641008714f42176f356b6.pdf?index=true
    • http://luxexobaw.rf.gd/86347878607.pdf
    • 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_off0000fe38.bin
5d6e906b9f260d45178875a7cda9da63c5c29bb379aef91364071d7d6e05a474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 5452 bytes
font_01_sfnt_off0001109c.bin
8d4f5bdbc7cb39102b227c7f60737647a44a51f6722da37b87599868809fcda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1109C 10724 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.