Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1e1ce9e1917703…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 00:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d30dbfb2d5f57630b3ca7f72e070f082 SHA-1: 5d2e087b4fe54ca901057043d038a7e44dc15b5e SHA-256: 0c1e1ce9e1917703a5922f4f2b841758743c46616b2c649d8c7e9cfb460bf483
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to electrical circuit breakers.

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.com/wix?keyword=pouvoir+de+coupure+disjoncteur
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_486f1f31eea14163a8fc8d6835a42799.pdf
    • https://static.usrfiles.com/ugd/0d2908_d4d020506c8247159097c384fc4164b4.pdf
    • https://static.usrfiles.com/ugd/a64c8c_24f760968c29479c95aef4fedc52e7c1.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/xoliwusepubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0139/6896/files/lepawezogupamadobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/personal_computer_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/kibofepipepoden.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/97344207714.pdf
    • https://cdn.shopify.com/s/files/1/0429/3938/3971/files/78911512262.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/dumubelabagawenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8476/5591/files/revujimiti.pdf
    • https://static.usrfiles.com/ugd/d54300_11d034a2cc524990a3a49e52cb6ab969.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb29977c52a348d393c4cc9969d8b762.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d53.bin
bfec259ed156c39697707e64636efb0f35d2049ad012c87f6ac350065740502f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 4844 bytes
font_01_sfnt_off00006de3.bin
0ff415db53c6ddbd4350992e147f0fda4e6c64c920c2c7759d2c5701cfdb9c45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE3 11708 bytes
font_02_sfnt_off00009258.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 4324 bytes