Malicious PDF — malware analysis report

Static analysis result for SHA-256 41046cda0eaf238f…

MALICIOUS

PDF

49.7 KB Created: 2020-10-31 02:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a1a23d00f5f86166e24605921b2708ff SHA-1: 2fa6d90da5170ae3b986227bf4c6a8237c86cd0d SHA-256: 41046cda0eaf238f220c1dfaaf71715ce79bd9498537ca5dcc547fdbad851b9b
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and brand impersonation, specifically for Amazon. The embedded link `https://cctraff.ru/strik?keyword=football+strike+hack+2019` is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the lure "Football strike hack 2019" and the malicious URL, suggesting an attempt to trick users into downloading a payload or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d7dfa3bc38dcb.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/strik?keyword=football+strike+hack+2019 In PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d7dfa3bc38dcb.pdfIn PDF document text
    • https://tudekazesabi.weebly.com/uploads/1/3/4/3/134367585/xeluvuzutupa.pdfIn PDF document text
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/1733946.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/1843101.pdfIn PDF document text
    • https://fenawivo.weebly.com/uploads/1/3/4/0/134000055/71b4b0688264ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aced59e3-d9b4-4b26-8376-3eeabe35782c/xuxujekixixiju.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/billie_jean_guitar_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/sevafenat.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/58303701996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d26f71-34c4-43fa-8612-a53de76caa69/pedodigitazirovo.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/sideload_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0984ea9-9071-44b9-8c61-fb2c374f8404/essential_home_emily_breakfast_nook_assembly_instructions.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_off00006846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 5528 bytes
SHA-256: 42888a7ae24fb9ac587408a3fa9a1cdd665b5f76a849c6c57dce53c6646689f8
font_01_sfnt_off00007b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0D 10196 bytes
SHA-256: e6e7f114d87d881042845daecbc92aa614303b1b022983fc24180f2c84df5225
font_02_sfnt_off00009e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E21 17904 bytes
SHA-256: 860691d9d0386f3a21b9eec956415b8e9a300127d3bcd6a68c32c778c6de8757