Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d31bb99f32bf79c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 00:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3c0337a208f39099163973fae1f7365b SHA-1: 90bb677f7ad9f65fbbca118a66279ce98e5de06f SHA-256: 0d31bb99f32bf79cbcc36fa36c2713b60551d084d359dfdd91cbab7adbde3abd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO link farming. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of numerous external links suggests an attempt to direct users to malicious content or manipulate search engine results.

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://mezovuduw.ru/strik?utm_term=whirlpool+front+load+washer+sud+error+codes PDF link annotation
    • http://sifaritube.sportsontheweb.net/defozufevazavijamikolax.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/vusuje.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/zijez.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/xexesiliberaw.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/xujifefetideb.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/atualidades_2020_download.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/3043009.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/surevasenijimogutez.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/celtx_manual.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/5595393.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/ethical_considerations_in_marketing_research.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/kamegovu.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/58632198253.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/f54d77ea-3fb6-4cd5-be5f-c436ca5a2517/jiduwajobuvuzikajuzuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50420adc-51c4-4363-8bea-32daf2c68fe3/99742705160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694e675c-4916-4d32-bc73-d56341fe52b6/zojivizonolalon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbc9b13-9b18-49c4-a3da-e9a5e0191445/hp_laserjet_p1006_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/34169119529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e4f3a2-1e20-4d7c-9a1b-0a54ed633daf/61378906200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e7a011-e6a3-4509-aae3-347eca98f5ba/vopiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1d9b9b-3be1-4b9a-a07c-befb71daee37/musufodenub.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/33534602640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa70ac65-50ff-4df2-a8f2-f8c2ae5491be/cub_cadet_lt1050_drive_belt_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689f6e1f-2a64-4bf9-933a-dde089af7672/tintin_book_sri_lanka.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_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 5348 bytes
SHA-256: 1f1dbbaca67d3c116ffc1538673bc5d2f5dd4415d70c681b87427427c7cde223
font_01_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 10492 bytes
SHA-256: d37989d3ab2ac7d2e93939a02ac04a6cc86af0e633ba4b787c84fe0bea999b11