Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6b1642ae12f8f8…

MALICIOUS

PDF

50.1 KB Created: 2020-07-10 11:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afa56f9d00e47447f7ef80d7a29f2df SHA-1: 029c41ef5312bb165817b6a2415d7637ad46a012 SHA-256: 6e6b1642ae12f8f8df5d2d94eb9f3737924bf0f58914d6b3bcbc6e3332d3f15e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to suspicious domains and are flagged as malicious redirectors. The document body, though obfuscated, includes keywords like 'Biomolecules chemistry class 12 pdf ncert' alongside URLs, suggesting a lure to trick users into downloading or accessing potentially harmful content. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=biomolecules%20chemistry%20class%2012%20pdf%20ncert
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.kwongwingkwan.com/uploads/1/3/0/8/130813799/zijazawoxa.pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • http://files.homesdomains.com/uploads/1/3/1/8/131871488/873ef.pdf
    • http://files.enduringwords.org/uploads/1/3/0/7/130739503/4216710.pdf
    • http://files.macklandscapemanagement.com/uploads/1/3/1/0/131070078/sikusavenuto.pdf
    • http://files.bridgehousesarc.org/uploads/1/3/2/7/132710704/b8536d8.pdf
    • http://files.roadiesrule.com/uploads/1/3/1/1/131164199/7b31fa1f3127cb.pdf
    • http://files.astraknots.com/uploads/1/3/0/7/130739318/6b5af99d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dowixame.files.wordpress.com/2020/06/neravukigapuwasinexiduwe.pdf
    • https://zuvijig.files.wordpress.com/2020/07/wopugulezimukibatez.pdf
    • https://forenuxi.files.wordpress.com/2020/06/58953990111.pdf
    • https://gebotapigi358268599.files.wordpress.com/2020/06/majeriduxabizu.pdf
    • https://nakilopediv.files.wordpress.com/2020/06/nikizugix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.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_off00008570.bin
fad77dc4895ea921e1e712034c9c036b20bc08a117703a67e509bb1bf67d2e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 5612 bytes
font_01_sfnt_off0000986d.bin
3581e7202b579c8e9dd523d72264d6ecb6c2099b8ce83f4fbd5ad04477df0358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 10180 bytes

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