Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d1559d053e295e…

MALICIOUS

PDF

86.4 KB Created: 2021-04-10 01:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b219106a13d22fc45360af4ea1282197 SHA-1: d4d311b46b51fee49f9a599a6c6c2853e2ac1836 SHA-256: f1d1559d053e295e0c728edc11882ef3cae44bf4df685810e07c0b2c551e542a
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an SEO redirector. The primary malicious URL identified is fokemale.ru. While no scripts were extracted, the PDF structure and associated heuristics strongly suggest a phishing attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/strik?utm_term=maytag+bravos+dryer+timer+not+working PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/alphago_zero_nature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5610bbfe-7a5f-4f5a-a5be-2d6b602a866a/how_do_you_start_a_wood_splitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4645fb-4fb4-4c74-a67e-1f5d909528fc/evangelio_de_tomas.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/42372205024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd72bf7-ff9b-41aa-9efb-b5a63780b91f/spiritual_practitioner_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/vodavobofonufozujolud.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/the_authority_of_the_believer_kenneth_hagin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7480c24b-e8ca-448d-862a-f4446190b41a/giwuwabejaxewepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa940e15-c8b6-4ba1-ae11-684c19769d07/59650625045.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/samsung_series_5_smart_tv_disney_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8845f71-3924-4fa5-9c00-f9c9ea1aaadb/82473991585.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/81603539642.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/46755902485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ea0c5d-7f53-406c-a582-8ba47d93613d/tiradupuredigijolofipaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/ruwox.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/ambarsariya_pani_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca502041-02dc-4954-866b-01b9b6553e98/didiwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee30c382-75e7-4513-b3d8-eb8cc3f91429/gopomowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de8baef-ead4-4d82-98e6-b6eaa9120bdc/safuler.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/dolejal.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/padirenujovepajusulasarit.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/where_to_take_seashells_links_awakening.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/algorithm_design_manual_course.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_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 5576 bytes
SHA-256: e272975431e003a1b942478918bde9bbb568338d267f9e1a6b164b5f87254360
font_01_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 11472 bytes
SHA-256: 2921a676232c984a6bab428d0ef16658fce751deda1f48a15eb41f5f2e7e65f1