Malicious PDF — malware analysis report

Static analysis result for SHA-256 07886bbabe0f4247…

MALICIOUS

PDF

78.9 KB Created: 2021-05-28 05:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11860c1dfd63fa3c91644e6f59fa63e0 SHA-1: b09e975279e4d00bb39a65d4bccfa586f4a51687 SHA-256: 07886bbabe0f4247789e53bf5eb45fc2ad75b3e024c2a886ccb9668ab41e1008
186 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 0.9991

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=c+major+scale+position+1+guitar PDF link annotation
    • https://numuxubolab.weebly.com/uploads/1/3/4/3/134382028/kavujimofewep.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/fabokixenu.pdfIn PDF document text
    • https://pujumisetuwu.weebly.com/uploads/1/3/4/5/134576336/farasozilanelop_bivatibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5fca7caa1a882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fcd995318bc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_6035fb020f8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_603d2a832cb78.pdfIn PDF document text
    • https://lezigumaluneluw.weebly.com/uploads/1/3/1/4/131454696/5a2855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fdd888478773.pdfIn PDF document text
    • https://gugakelu.weebly.com/uploads/1/3/5/9/135965899/dubonaf-kobezefilil-solavize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447631/normal_5fc8159dcefd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_606368850707c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45a86db-7e03-4f86-9664-a0f8b0f5c787/botevabegiwiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d0a1663-3a68-48db-9813-b59f760f905f/48873947217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62f3f31-59fc-48ed-a065-e9eb4b0d92c2/which_of_the_following_software_life_cycle_models_that_has_risk_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0b3a2c-5009-47f6-9f57-db25bc6e4586/ouverture_compte_paypal_sans_carte_bancaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9e31ab-56ef-4038-8513-b7d85e5e23f9/zawamiruwudojopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c200dc4c-071a-4a18-bbc3-c00012176a35/22072933752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2971df94-d0d4-4476-b45d-93ace88226cc/38740970043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34a31f4-94aa-4419-b9fc-91479a385059/kawevimudesekar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704dfab1-32b4-4aae-aa85-d737f6f76ebc/dell_precision_t1700_graphics_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996584bc-fe56-437d-ba00-285b18c31097/arduino_pro_mini_programming_ftdi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f564c2e5-ae6f-4eec-a3e3-c351918880be/briggs_and_stratton_vanguard_16_hp_valve_clearance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d191f9e-233a-40d0-a4a2-c544d35b7b8d/tissot_t_touch_solar_smartwatch.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 5284 bytes
SHA-256: ba5fe1035ba0588e9760a0dcf34056ab027b2799fc9b53af8ce0e8bc8cf15e73
font_01_sfnt_off000108f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F5 10388 bytes
SHA-256: 89380aacd084dda38bd7688fbfc5cf696e343d425caa638f68707e2b115fc03e