Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99cba89a81156f7…

MALICIOUS

PDF

40.5 KB Created: 2020-10-11 02:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48117ff4e73634f42f0b45f68f611578 SHA-1: 695126fb0829b3f91dc9b9bf1a30d04dbce817b9 SHA-256: e99cba89a81156f79968c29cacc73fc9779f1bbf39c541a9c8cc3b3d677c4273
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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://gettraff.ru/pify?keyword=sigma+1609+sts+manual+dansk In PDF document text
    • http://files.procapftw.com/uploads/1/3/2/6/132696122/pemoxataduwefesam.pdfIn PDF document text
    • http://files.testingequipmentstore.com/uploads/1/3/1/4/131455832/talutekavut-kudareko.pdfIn PDF document text
    • http://xupego.perfect-art-match.com/uploads/1/3/1/3/131382470/kagarij.pdfIn PDF document text
    • http://files.ljhchoirs.com/uploads/1/3/0/8/130813314/tojefef.pdfIn PDF document text
    • http://files.wren-project.com/uploads/1/3/1/3/131379420/wororoz-walif-temima-pikosaselegi.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/jesotarijezijiditakire.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/11160719012.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/1/0433/4783/7083/files/t_fal_easy_pro_deep_fryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7664/3737/files/wow_classic_elemental_shaman_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/vekijiwiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0374/8247/files/movie_hd_raw_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b109576-607a-4117-9cf3-4452f66d08c4/guwumosumofiwifuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d7fb08-57cc-4034-ac8c-4977a1634dfd/pepajezovuzerawunodera.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA7 5720 bytes
SHA-256: 6073a53c7cacb9523ffd9aebecf06a38e2c7baf40790564c4da9f31ee2a9fc28
font_01_sfnt_off00007306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 10156 bytes
SHA-256: d7d0bbc3c1d9f47c669e832f708dc312b65769da2272b7d08a903107f382302f

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