Malicious PDF — malware analysis report

Static analysis result for SHA-256 71924c5778847376…

MALICIOUS

PDF

77.0 KB Created: 2020-12-14 12:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 714fe6d09b65b492cb29c3afd7dd33bc SHA-1: 0287e9e9af4bca1317bb7e97ee680ceddc7b01c7 SHA-256: 71924c5778847376bd0c759fe9f65b304f386c97259b4a31835f19eaa6364230
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://gettraff.ru/wb?keyword=video%20abubakar%20shekau`. The presence of a link farm and the malicious redirector suggests an attempt to direct users to harmful content or to facilitate further malicious activity. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/wb?keyword=video%20abubakar%20shekau In PDF document text
    • https://banukusisazej.weebly.com/uploads/1/3/4/8/134893357/wuxisodu-letizun.pdfIn PDF document text
    • https://fipiwodumuxi.weebly.com/uploads/1/3/1/4/131453050/verufapepomeged-toralezega-witubeno-vifemexekoguk.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/tenunud/9282248791.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/gofufuxesa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc016b9c30a162e0c4e17a3/t/5fc26de7f8cdb769c631fdd5/1606577639820/dufakatetarijojisexa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc181a368612547ed627098/t/5fc50f1a08845d09242a1a66/1606749979232/technical_communications.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce00863775b77c105ddd03/t/5fcf4a241a78ee5f0163e2e5/1607420454187/zumba_classic_deluxe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1b0084698658e5e73ac/t/5fc2e6fa3570fb44d1636300/1606608634500/85453730428.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7b740f1034a5ca8d025/t/5fc7a935e2dcb1274df6ce16/1606920501562/cnc_vmc_machine.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ebffabffab30daa8de6c/t/5fcce64833187724c4f17bf9/1607263817538/jefexoxineka.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5048 bytes
SHA-256: 207c05b1f58f6b0e98091cd65ba6697196eac4597d9be1033c43cdc6539e138c
font_01_sfnt_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 11660 bytes
SHA-256: 1362ccbc752fabe3b7772a4de0b9203f9d8d52dd6d94032465b35681e88fc80a
font_02_sfnt_off0001126d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126D 16136 bytes
SHA-256: 501a93d021b6b1beb77afd0215a71eba2e0a1775c57000da7e5fdcda9452c3ff

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