Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a58c72bbc010e4b…

MALICIOUS

PDF

57.2 KB Created: 2020-07-30 12:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef08f3c2a8d66c31335884982b5c8ef2 SHA-1: 393259d758c209b10c6c3616b604c9e0e2d1530c SHA-256: 2a58c72bbc010e4bca1e14c826aac0984e7af1a242d7c0d1434bbc8c33592fa1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure ('Guía ceneval egel medicina general pdf'). The primary attack vector involves directing users to malicious infrastructure via embedded links.

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/pify?keyword=gu%25C3%25ADa+ceneval+egel+medicina+general+pdf
    • http://files.whitelightempaths.com/uploads/1/3/1/4/131437061/vunur-woguzuwugedobi-ketotilina.pdf
    • http://files.jeniferwall.com/uploads/1/3/0/7/130775084/c7127b48645.pdf
    • http://files.mistressmorgana.com/uploads/1/3/0/7/130739895/387d902f5709bc6.pdf
    • http://files.customordercakes.com/uploads/1/3/1/4/131408899/leresoluxabojog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/75026702140.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/15437195127.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/jetozirosezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/dokefulawotisinipibemusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/rexulorasifipojogemipup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/livupejefusuzofubagapa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/barizodagavok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/62443457653.pdf
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/zoxix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/lepevejesuvorewurema.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/regenoradedazorazafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/jotelo.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b3.bin
2695c300b94bf8a63f752bb6e2b60d27dd51ef80289acb6f8c23a26d29743e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B3 7344 bytes
font_01_sfnt_off000090e4.bin
44ac9cab2870ffe83868dbb7f54fca2cb17475387ec74a7ae36537927ae43795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 5136 bytes
font_02_sfnt_off0000a246.bin
3859dbb4f3efda5175b5cd8344215d9ffbf99942b235423447794edd4a7812f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA246 2856 bytes
font_03_sfnt_off0000ae1e.bin
30af675d63e41a50154d1df746cc227dab926a5ce4bd7a731b70dc7d72d85666		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1E 11704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.