Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7feca144d4ae2e…

MALICIOUS

PDF

82.2 KB Created: 2020-12-28 08:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42d02124a92018ecd1aefe17339f2ae8 SHA-1: e282ed84b4c3d8c77a697f51a8a711a748273e49 SHA-256: 8e7feca144d4ae2eca12c5f9ec8ea55aff6510c487c1d86e9c409364bfaff3fc
236 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a phishing document and a link farm, with one URL pointing to a suspicious domain. The 'SE_CLICKFIX' and 'SE_MFA_LURE' heuristics suggest the document is designed to trick users into executing commands or providing MFA codes. While no scripts were directly extracted, the PDF structure and heuristics strongly indicate a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://traffking.ru/123?utm_term=code+format+samsung+trend+plus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fc87b2696c1c.pdfIn PDF document text
    • https://nudomituge.weebly.com/uploads/1/3/4/6/134677479/nuxose.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/105805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5fbac42547a24.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/7837527.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/wovigebi/56337904841.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/purble_place_game_free_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/southern_african_history_books.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/weather_radio_midland_wr_120ez_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/rekebu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/menards_countertop_laminate_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/buckwheat_hot_cereal_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/pan_card_annexure_1_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/giginixexerexudime.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/search_files_on_website.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 5268 bytes
SHA-256: 3ad46b95cd0dfc589472895301a8c8cd0f81a3ba0831f2a0120f079ba6c593bb
font_01_sfnt_off0000fe85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 11208 bytes
SHA-256: bc60a9f43b48ae64e6a0465706e2091149ac494c6a11698fdf3fc1b7dfd9adef
font_02_sfnt_off00012521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12521 16488 bytes
SHA-256: d26fdce492fb9e8c49f527e3a91555393c735dd4d56e489be838b86a3f7c22b7

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