Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d5db1180047776…

MALICIOUS

PDF

77.0 KB Created: 2021-02-14 01:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 080ee292d76b54825785d0c5d657d106 SHA-1: 71a2e7bd19cee604d64c43dca737622e48366435 SHA-256: 83d5db118004777670ae5a10fa480a19884b146b2605ccd909c7a126552e7b9e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as search results for specific documents. This technique is often used for SEO spam or to direct users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=exploring+anatomy+and+physiology+in+the+laboratory+2nd+edition+pdf+answer+key PDF link annotation
    • https://cdn.sqhk.co/fubafonu/gjjcEjj/okra_in_spanish_puerto_rico.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/dWiijia/island_park_idaho_weather_today.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/jILifiy/26099548808.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/Lbie03D/starcraft_pop_up_camper_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/2f4Mid9/fijutuvemazeka.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/widib.pdfIn PDF document text
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/gitinokunesi-dumupesud-kisiles-xizimagora.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/EE1gcib/kosadulolofak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/levovod/jio_phone_uc_browser_link.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/bepogufegalenefasav.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/vintage_boy_scout_uniform_pants.pdfIn PDF document text
    • http://sulasusiramoti.epizy.com/90127078864.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/mac_format_usb_master_boot_record.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/82622834809.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/78740611373.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/laserfiche_administration_guide_10._3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 5800 bytes
SHA-256: 1a6db7e3a849e6a5a8e8d5b6d06682be9dddb4489f39556a98b5df67072084a2
font_01_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 14696 bytes
SHA-256: 3994940c0e153ae278d9c6fa6c9cd78e36abbd778e3e83ea02afd255ded9504f
font_02_sfnt_off00011844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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