Malicious PDF — malware analysis report

Static analysis result for SHA-256 008103f1a7265bfa…

MALICIOUS

PDF

73.5 KB Created: 2021-03-13 13:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 677dd919a1f2cbd4d48e3739088aada9 SHA-1: bb788b3409d869969463c8d320ecfa28e0444e6a SHA-256: 008103f1a7265bfa7ce57cebe7f61f0290fa86d89ab26e4fd9625a30b95c351e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards techniques used for redirecting users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://jottigo.ru/strik?utm_term=remington+700+short+action+308+bolt+face PDF link annotation
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/7e941d4.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/lanupobum.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/betalactamicos_veterinaria.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/2453942.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/cannery_row_chapter_13_summary.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/debotofibusibe.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/13f42c38c.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/letter_from_birmingham_jail_quotes_about_freedom.pdfIn PDF document text
    • https://lesavamu.weebly.com/uploads/1/3/5/3/135347369/3629920.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/kirol-tiguzuxe-mololabakun.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/pesadibikomulimotom.pdfIn PDF document text
    • https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/kusobir.pdfIn PDF document text
    • https://napuguvu.weebly.com/uploads/1/3/0/9/130969658/55b42175e55ab.pdfIn PDF document text
    • https://fabodafulunulof.weebly.com/uploads/1/3/4/3/134372089/fa5f323.pdfIn PDF document text
    • http://belldiscount.ru/kohler_shower_faucet_installation_guider1u3t.pdfIn PDF document text
    • http://mixit.info/kepefosebuzusutalulijebhlv7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/sajiduf.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/32910344693.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/alidropship_woo_plugin_free.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/pathfinder_player_companion_ranged_tactics_toolbox.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/fixupemanemuwisod.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/book_report_example_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/acg_guidelines_esophageal_varices.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/escrever_email_formal_exemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/lafipijefepufakavuligevon.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/panolinukaneluwudu.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_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 6024 bytes
SHA-256: e41d095db8650535c4dd581dcd5317d076157342b03cdc8370368121aee0bf0f
font_01_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 11028 bytes
SHA-256: 34dd7ea1d037363c488ba6b9166e275c73823f2ac74e65e9ec8b0f3e7507978c