Malicious PDF — malware analysis report

Static analysis result for SHA-256 3862f220a3d561aa…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 09:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 73faa822422951ea87a11def6f4cdcc2 SHA-1: f2b4c145032c30f55a38974ffb16f6853a6ba9ce SHA-256: 3862f220a3d561aa11418b33adc9cec5250d0e7f07d1d09fe6603ab4f6919d3c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The primary malicious URL, 'https://gimoguvi.ru/award?keyword=icici+direct+cfp+study+material+pdf', is likely used to redirect the user to a phishing or malware-hosting site.

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://gimoguvi.ru/award?keyword=icici+direct+cfp+study+material+pdf PDF link annotation
    • http://xujilutobidiko.iblogger.org/gumming_sheet_dealer_in_delhi.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/walmart_near_me_black_friday.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_98f185a73bf34792923d9598c3ffc495.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_2125347c0ed249b088ce39a268e3de47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/tesubusuv.pdfIn PDF document text
    • http://vedegisawopuf.epizy.com/repowaranidemapebo.pdfIn PDF document text
    • http://jilerixam.epizy.com/audio_books_free_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/52018639921.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_ee654009fb394212951325baba76dd50.pdf?index=trueIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_faebb4b798a742e096b98fb2e675c1ad.pdf?index=trueIn PDF document text
    • http://lugirike.epizy.com/celine_dion_songs_mp4.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_692e169196c14446b6d621079f6227c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/samsung_a80_camera_apk.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/design_calculation_of_pressure_vessel.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_2e2011ad042d493fa2f4d8448a45728e.pdf?index=trueIn PDF document text
    • http://xaxigodugekesiw.epizy.com/70736606929.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_30d796de30c84f0ba45bf42a6d607e30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/how_to_use_zoom_h4n_as_usb_mic.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/fesatoze.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_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 5340 bytes
SHA-256: 34357f31beb3cc16ec19669bea9a47ea99da65e1bdc3825556b4d1f9a8292b14
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 11416 bytes
SHA-256: 0b4e03a7c26472c310f261ea8099137e4e83fe97c95d9f2d3a56c255bba064c4

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