Malicious PDF — malware analysis report

Static analysis result for SHA-256 704cc0a1fe4eb193…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 14:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ada5b4c6ae06642028edbf3a12ecc72 SHA-1: 72d9b079bc53f84ab6aef6ba1eec7f93e9ccc2c0 SHA-256: 704cc0a1fe4eb193e8722b4ddae3b7deb9a710552a128bb14737410dbd98ea27
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a phishing or scam attempt. The document body and embedded links suggest a lure related to a form or document, likely to trick users into clicking the malicious URL.

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://ttraff.ru/wb?keyword=formulir%20spt%201721%20a2%20pdf
    • http://files.bemispa.com/uploads/1/3/0/7/130739704/a2237d8b.pdf
    • http://files.princessrapcrap.com/uploads/1/3/2/7/132710638/nonizatutewipi-nizoxanani-jopimezogeve.pdf
    • http://files.kimwattspsychic.com/uploads/1/3/2/6/132681969/wuzaxufofezet_topopibok_gifagiwif.pdf
    • http://files.mountainridgecounseling.org/uploads/1/3/0/7/130738753/5796377.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/vixejafodikazidaziv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/advanced_excel_course_material.pdf
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/pinaruvawibesonowupupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/weposejedikaxejerad.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/27466648334.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/calculus_with_differential_equations_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/lovunimopan.pdf
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/employment_contract_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/serixibi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/80122452589.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/84532328574.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_off00005bde.bin
c6f68905698152b11e9776c669e7c8778e8ad8ad81563396a32e7afc364ab58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 5404 bytes
font_01_sfnt_off00006e35.bin
4d8dfbe9d9ec9a8c325869f75469f8d876aeb0a68968614b07d0c48e93fb063e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E35 10136 bytes

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