Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82b05e18a93c2ab…

MALICIOUS

PDF

80.8 KB Created: 2021-02-01 00:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 39c76cfdedff10da27d5adff0ef99a55 SHA-1: 176e8c671f9e1fbe3dd8f38ad7e90b7d3c6e7611 SHA-256: a82b05e18a93c2abfcf6c8672f89a7f80504cb655c8651d5c1daf06345c99276
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or are part of a link farm designed to distribute content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests a malicious redirector pattern.

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 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.
  • 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://yafferge.ru/123?utm_term=apk+editor+apkmos In PDF document text
    • https://vuloxeresipagig.weebly.com/uploads/1/3/1/0/131070754/mudojasesurerelawuw.pdfIn PDF document text
    • http://yognat.space/bunoninobanedoyx.pdfIn PDF document text
    • http://bluebadge-support.com/87268464582g1ueg.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/duvewitivunavedajub.pdfIn PDF document text
    • https://cdn.sqhk.co/rogokivika/ijquljh/1055_heron_circle_joliet_il.pdfIn PDF document text
    • http://kinoxca.xyz/list_of_common_adjectives_in_english4i7ol.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/d2NjaTP/video_player_android_terbaik_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bipukawu/EjhidZo/bagezinaluvapapit.pdfIn PDF document text
    • http://xilegutopeza.22web.org/39767359652.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/MVibM7W/mcd_number_near_me.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/a7e422528622.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetulugesoboko.epizy.com/minecraft_bedrock_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/22881001354.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/bajrangi_bhaijaan_film_song_pk.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/uk_visitor_visa_application_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/21049885869.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/63752722412.pdfIn PDF document text
    • http://tokavasetalan.epizy.com/quality_of_life_meaning_yahoo_answers.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_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 5124 bytes
SHA-256: 10e5f25d73a82a53464b2ae29e0993dbeda0dd373c5250b50398f860ed9b2182
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 11216 bytes
SHA-256: 40fda000b748f1346d076af7f2b79dc71a1787c13d684aa05e97ce6718270a0f
font_02_sfnt_off00012056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12056 16200 bytes
SHA-256: abd4c962e03017e928cbd68b9323645de88a3c31ce95c5f70960fd827010b359

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