Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bdf7420a12e6a6…

MALICIOUS

PDF

83.7 KB Created: 2021-05-17 14:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 38bde64b7dc9246a4942bdcb8cd3a014 SHA-1: 57b2d4e9b57c47e0b419dc9e73e72aec6b5c6f98 SHA-256: 76bdf7420a12e6a64326a1557ff87da1fd2ab7ea06b1ed3f1c030e9e270c240d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://pelibifir.ru/strik?utm_term=yardman+snow+blowers+parts PDF link annotation
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/4b05e33326.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/19924903802.pdfIn PDF document text
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/5ba31e58e21.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/7046494.pdfIn PDF document text
    • http://tunulawofu.iblogger.org/crossfit_training_guide_nutrition.pdfIn PDF document text
    • https://lozoveku.weebly.com/uploads/1/3/1/4/131438804/lolokag_jifavonipiti.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/buraf.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/99184352174.pdfIn PDF document text
    • http://gexisefi.iblogger.org/tijaxarapokizinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/bezidukizoxonovan.pdfIn PDF document text
    • http://bizivedigudo.epizy.com/joint_venture_agreement_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/centre_europen_de_formation_avis.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/putokuwun.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/63848537529.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/pop_ballads_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/38649575815.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/36481764942.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/nokia_chat_application.pdfIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_38484b399893490b8f41b630cc99ac56.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_c0f054891ad7468c86532e8e7f04528b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/animal_world_map_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 5296 bytes
SHA-256: b1917219006242fe4668b62876c7fe50266a6953b78c5f87b909cbfdd1236933
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 10788 bytes
SHA-256: 9bf715dd5a1e786849c8b620beee6ebd852f667d9c2c50b730771e68c4e0e754
font_02_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 16392 bytes
SHA-256: 8d9529fca8e49fd747a132c86257b3f003f6793d9f50918e3e02e184cbe99d44

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