Malicious PDF — malware analysis report

Static analysis result for SHA-256 78617ec8356580cb…

MALICIOUS

PDF

49.5 KB Created: 2020-11-03 09:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fdbe6f2f425368077c22218fed2fb016 SHA-1: dbc5449553b2f422bda61a77b66d0fdf31d305f1 SHA-256: 78617ec8356580cb802f903e4f4e78583abe84f135f2464162bd78878ef3f702
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=minecraft+education+edition+apk+for+android In PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/jovalaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f9e372314f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f9a37688883d.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/e0731eb80ff6.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/janodojivi/speed_problem_worksheet_1_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8992/9391/files/idsa_guidelines_on_diabetic_foot_infections.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/polaroid_snap_touch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/scarlet_clicks_strategy_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/viroxurarozawexafipajasa.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/pubojefovozojod.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_off0000693e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693E 5008 bytes
SHA-256: e4cad68c38976571c045c4bd43693ef53a8bd505aedb47a873100bbe5409c9c9
font_01_sfnt_off00007a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6B 11680 bytes
SHA-256: ae6194cc8041fd69be4813807613546d81e770a0dc92fb00e56a574961a90315
font_02_sfnt_off0000a197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA197 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e