Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5dc289b80851dd…

MALICIOUS

PDF

57.6 KB Created: 2020-08-04 21:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c43ea319c47a7d98a63011d7255ce6c5 SHA-1: 73b0a4e4ab56136ba5b3eac27f9ccce0bd2c6886 SHA-256: 7e5dc289b80851dd7f3c0728ce5061417ef8814924e3a43eae4377e7d3b0900d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites, potentially for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.cc/pify?keyword=journal+el+khabar+algerie+aujourd+hui+pdf
    • http://files.readersbeware.com/uploads/1/3/1/4/131437669/dubevemir.pdf
    • http://files.chrisremitzcpa.com/uploads/1/3/0/7/130776042/xepigus_givelo.pdf
    • http://files.alessclutteredlife.com/uploads/1/3/1/4/131406390/jadewunawo-vatesebad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/najumubatojowowiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/92267578189.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/73644915376.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/zuwivarapafewutavev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/vonixijizotosaxikisut.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/86522797208.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/paterimumasakeroravet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/29457442282.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/kamafulinuwimidar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/hip_hop_dance_move_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/tobekovusetasije.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/zofuxulexomejaze.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d74.bin
48dff197f9b86cf46f334aaf796284c6e8d3f649151bf36badff5f5d07f2c5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D74 5392 bytes
font_01_sfnt_off00008fc8.bin
9903e8279174eb746fb3d943fbd94fcf14c1ce21ad3c082d428075f2c212509b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 12304 bytes
font_02_sfnt_off0000b76f.bin
238ebdfdd72421e55cb00447f9d7a3bd8b6d20234828dd7d09589b439f408959		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB76F 19440 bytes

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