Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fa341fc1c71c08…

MALICIOUS

PDF

49.3 KB Created: 2020-10-08 19:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5f42edef9c3487a6c938c5e6fb1e53e6 SHA-1: e1e9345543fb14846406957b97473d5654eb8a15 SHA-256: 48fa341fc1c71c08f1c58e050dd087c88038ffa5917cf31c1e81e817e678882d
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to event presale codes and also includes URLs that appear to be part of a link farm designed to distribute further malicious PDFs. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=ticketmaster+chris+stapleton+presale+code In PDF document text
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdfIn PDF document text
    • http://jadabo.winnipegjazzorchestra.com/uploads/1/3/1/3/131384721/65ef3ebfbf36974.pdfIn PDF document text
    • http://files.shopmismo.com/uploads/1/3/1/3/131384113/tejofevuwebotol.pdfIn PDF document text
    • http://files.soapbarlounge.com/uploads/1/3/2/6/132695405/8758677.pdfIn PDF document text
    • http://files.ablmembersarea.com/uploads/1/3/1/0/131070719/a3c8be566.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/lazawidujefuxik.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/perikatuponurifagudimoxid.pdfIn PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/78195160799.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/9553588492.pdfIn PDF document text
    • https://site-1043216.mozfiles.com/files/1043216/87718961103.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0375/0817/files/fofexexirenuzefaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3160/0538/files/wexaraxevojod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0438/2365/files/negative_rna_virus_mnemonic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5812/1883/files/craftsman_combination_ratchet_wrench_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e598c94-725a-4e89-a33e-65d775a77d92/dejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f755fbc4-abf0-4546-b8b8-af754ef1ae55/somalakezin.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_off00006bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCC 5328 bytes
SHA-256: f0b90f5ddb93d7512f3ca31937a6de6e4d0a200aa127ed148236ae34362f988a
font_01_sfnt_off00007dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 10912 bytes
SHA-256: d3639360827ac9fdc81242de309f15a256bdcd8e40a9917793cc4c7fe06eb899
font_02_sfnt_off0000a2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F9 16144 bytes
SHA-256: 4b39140c652e6d058fe59e0172338ed7e0b8c56e7cdf0ba82c6c8c4172db5d18

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