Malicious PDF — malware analysis report

Static analysis result for SHA-256 693b54f4716587d7…

MALICIOUS

PDF

42.4 KB Created: 2020-09-06 18:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0b0514a54933af8e9c5efc1c541f816 SHA-1: eda9939b2f27c88821bce688b42220ba8b928867 SHA-256: 693b54f4716587d7dc201fdeb79683f2b49b6e842b31903e57cb0fbfafb15d81
194 Risk Score

Malware Insights

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

The PDF document contains a lure suggesting it is an 'ibps clerk registration form 2018' and includes a link to a redirector. This tactic, combined with the heuristic indicating a browser extension installation lure, suggests the document aims to trick the user into clicking the malicious link. The link likely leads to a site designed for credential theft or malware distribution. No scripts were extracted, but the PDF structure and embedded links are indicative of a social engineering attack.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=ibps+clerk+registration+form+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/804ff6_6d75e252e2af47318225bc718ec00040.pdf
    • https://static.usrfiles.com/ugd/429b25_d75dbdf1342c4248bbaca7ca4a78020e.pdf
    • https://static.usrfiles.com/ugd/bb13a2_b8959c6dd8524ed4bc810cf1a31b8b53.pdf
    • https://static.usrfiles.com/ugd/80bfa9_b8cc8ab0db474e62b06008e30fd710b0.pdf
    • https://static.usrfiles.com/ugd/2ca09c_94364362cdb24218b521e11175fd3fe2.pdf
    • https://static.usrfiles.com/ugd/2ca09c_f258fd8841e84150b68e86d452651d78.pdf
    • https://static.usrfiles.com/ugd/b8c837_e64ffd810cc94ce9856bbf1a598e6d9d.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/ikea_sheet_set_twin.pdf
    • https://cdn.shopify.com/s/files/1/0449/5153/5771/files/fast_and_furious_7_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/network_security_exam_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/anorectal_malformation_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0462/7274/1525/files/nixivukegapekebuxiraz.pdf
    • https://static.usrfiles.com/ugd/7008f3_f55d39109e8c4118b979867c61518a85.pdf
    • https://static.usrfiles.com/ugd/9f2514_c8d180d26b9a41e99be1916ff92e0441.pdf
    • https://static.usrfiles.com/ugd/cb4a18_fcdbcec841a342c894823ec5abb20895.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062aa.bin
b0601db41d315510e431c5feb8183781d5795781b6a440df8d27305ea3a43a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5996 bytes
font_01_sfnt_off00007702.bin
b53dccec4896490b0c97c5bfb497c7b075773e6b6283d66142c81a54e4988e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 11820 bytes

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