Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67b373a5054e298…

MALICIOUS

PDF

78.7 KB Created: 2021-02-26 05:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d60239e514e9c94cf243005281b8f01 SHA-1: 619445e2b21efeaf6b9cb16a58aaf810fbcc6811 SHA-256: a67b373a5054e2987c57d16b2c96334d680af8bcf7055f80146d595f957d0e97
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to stock market investing, likely intended to drive users to the malicious URLs. No scripts were extracted, but the presence of malicious links is sufficient evidence of a phishing attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=stock+market+investing+in+india+for+beginners+pdf In PDF document text
    • https://gizivesokopupa.weebly.com/uploads/1/3/2/6/132696604/831a1.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/fapafizegeto.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/dapizanifimag.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/zotojedas.pdfIn PDF document text
    • https://mewupevubuk.weebly.com/uploads/1/3/5/3/135387541/lopadolonuwovamedej.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/hj1Pqjb/lenovo_thinkpad_e14_gen_2_amd.pdfIn PDF document text
    • https://xidekudogigut.weebly.com/uploads/1/3/4/6/134683706/zijupopatukomirijox.pdfIn PDF document text
    • https://cdn.sqhk.co/lesebonun/jjbjhUT/ragesupilunoxexa.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/utFjfjc/xejugep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jajuzefob.rf.gd/lords_of_the_fallen_guide.pdfIn PDF document text
    • http://zubumedi.rf.gd/automobile_spare_parts_shop_project_report.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/what_do_moca_test_scores_mean.pdfIn PDF document text
    • http://wivefexefanit.epizy.com/the_obstacle_is_the_way.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_charge_timex_solar_watch.pdfIn PDF document text
    • http://rebubokinore.epizy.com/88336456381.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5600 bytes
SHA-256: c5df96427fed2aaa13cc0802060168b19e238a58af0f845f600abece9d216744
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 10136 bytes
SHA-256: 1ff55ad8cb0e3cb35aa41bc9c4cdaff7100ca4dd64216d7475dfa1cb191778e2
font_02_sfnt_off00011efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.