Malicious PDF — malware analysis report

Static analysis result for SHA-256 586fd211b599d0e4…

MALICIOUS

PDF

76.2 KB Created: 2021-03-31 19:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b43e0faeb451c2d333198ced5e376ee4 SHA-1: adf2df106c79a1d98e66d34e484c5b5a7848d967 SHA-256: 586fd211b599d0e4a46a7011e58a48545a789bfd6e7433e33c1856c8d810f269
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body's mention of 'Bts dope song video' is likely a lure to entice users to click on the embedded URLs. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, potentially leading to malware download or credential harvesting.

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://vilenefex.ru/123?utm_term=bts+dope+song+video PDF link annotation
    • https://cdn.sqhk.co/nuxezitowefi/gcgjjiP/gamelalitudodudevir.pdfIn PDF document text
    • http://arfesopt.com/desierto_informacion_en_inglesjlmuf.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/93035844555.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/vikekodenisubano.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/55e89a30e8a5.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/ahfOuhe/now_you_see_me_3_movie_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/fA2jajb/ea_sports_fifa_21_companion_app_download.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/meded.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/j26sgjt/vuguzog.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/ihdgijb/forarisilafomulegezezili.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/3702454.pdfIn PDF document text
    • http://b4shop.icu/how_to_stop_vocal_tics_naturallykdoxk.pdfIn PDF document text
    • http://levantemosaic.com/aminofilina_dosis_pediatricahb5d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/41272162280.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/36452997744.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/65709331500.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/lightroom_tutorial_beginner.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/pierre_bourdieu_biografia.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_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 4896 bytes
SHA-256: 42b55f07c15e4413f19d35f62625f04b7c1683c92fbe3b41fba6c4b365ecc087
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 11396 bytes
SHA-256: 3f1709f1f94659447083979a24f0e61855096483e28de145766848f7ce7322a8

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