Malicious PDF — malware analysis report

Static analysis result for SHA-256 995b6e13a088d016…

MALICIOUS

PDF

78.8 KB Created: 2021-03-01 20:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a377b77d2d80a190c5458d3b2b0f9b29 SHA-1: a5aa27e2b133550cacda2c5322877658328278ff SHA-256: 995b6e13a088d01694f726c4624f014cb32d934947a41c70a62d6f136020f22c
104 Risk Score

Malware Insights

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

The PDF document contains a lure related to an American Express card membership, combined with urgency language. A critical ClamAV detection and ML classifier flagging indicate malicious intent. The embedded URL `https://nipisod.ru/wix?keyword=lifetime+free+membership+american+express+card` is the primary indicator of compromise, likely leading to a phishing or scam page.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/wix?keyword=lifetime+free+membership+american+express+card
    • https://static.s123-cdn-static.com/uploads/4489028/normal_5fccf4135b1b1.pdf
    • http://lowafax.22web.org/universal_extractor_for_windows_10.pdf
    • https://static.s123-cdn-static.com/uploads/4369334/normal_6001867c744ae.pdf
    • http://rowowesofazov.medianewsonline.com/wonobolik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tepusijanakigat.epizy.com/8340516083.pdf
    • http://sibexelopuni.epizy.com/gugizunononugas.pdf
    • https://s3.amazonaws.com/jedadokuti/hydraulic_lift_project_report.pdf
    • https://s3.amazonaws.com/buponuwebi/nephrotic_syndrome_guidelines.pdf
    • https://s3.amazonaws.com/remavuj/yasser_seirawan_winning_chess_openings.pdf
    • http://xokudofek.epizy.com/list_of_literary_terms_and_definitions.pdf
    • http://xolavozezimodan.onlinewebshop.net/cuantos_centimetros_equivalen_a_un_metro.pdf
    • http://gefubuforuz.epizy.com/rare_genetic_disorders_in_infants.pdf
    • http://lanoxitumamused.rf.gd/design_sponge_portland_guide.pdf
    • http://sakoperuranabij.rf.gd/8433489255.pdf
    • http://sazerubewufuzuk.epizy.com/77871402069.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin
e0909f0401711a848cfeaca2d15220af8793cc1e863f9c23d9980e0c0d97d149
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5512 bytes
font_01_sfnt_off0000ffb8.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 1800 bytes
font_02_sfnt_off00010845.bin
07fa1f7f7bbe3d2693d6c39fc0ba9b10c3bf8a23f7a5bc23a1fc18e03fdb2440
pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 10956 bytes