Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15cc2dbd34000a4…

MALICIOUS

PDF

129.4 KB Created: 2021-05-18 05:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 62fe75ce31598a55e51997cdc625b1fc SHA-1: df84def623211f7cc466dc56a26b0dc1e3abf666 SHA-256: a15cc2dbd34000a4879ffb4d9fa2d44ae978535214c49eadf443132c1cad0bcb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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=cual+es+la+diferencia+de+una+frase+y+oracion PDF link annotation
    • https://nixovutak.weebly.com/uploads/1/3/1/4/131406963/wonefejifakopejol.pdfIn PDF document text
    • http://wixomebimox.22web.org/all_types_of_application_letter_format.pdfIn PDF document text
    • https://fuzonigeli.weebly.com/uploads/1/3/0/8/130813785/ditexefolijure.pdfIn PDF document text
    • https://xuwukebi.weebly.com/uploads/1/3/4/4/134472968/fomosavexaba-dekov.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/432093e.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/fuwelezuvazilin-zedup-womivoto.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/6651989.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/ce94d5.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/789fa4d30ad231c.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/6566712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tumejez.rf.gd/4888778170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d81f07-63ed-4df1-8a22-39f5aad8cf74/garmin_vivofit_jr_2_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7285b4-beb0-44ba-8fd6-d45464470578/what_can_you_eat_on_the_10_day_no_carb_no_sugar_challenge.pdfIn PDF document text
    • http://rotutaj.epizy.com/rachmaninoff_biography.pdfIn PDF document text
    • http://lifenovofelajo.epizy.com/les_caprices_de_marianne_texte_intgral.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/41058526369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90ace7e-5c60-4428-9d92-f72851b4a1eb/graco_fastaction_fold_sport_click_connect_travel_system_assembly.pdfIn PDF document text
    • http://mosafipunot.epizy.com/64648250340.pdfIn PDF document text
    • http://lugopupi.rf.gd/why_does_atp_store_energy.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/kewezidokuku.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_off0001b933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B933 5020 bytes
SHA-256: ab34ffd6e4e101e1ecef69e74a0024751c6612c2c0c8c716fc9f2bc3cac75f7c
font_01_sfnt_off0001ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA5C 13604 bytes
SHA-256: 3a3a7d804c9ac3faba968ffaf9cc654b9cd10ca6e7a73bb325fb9d5e6abe2e4d

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