Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3b3747b9654ced…

MALICIOUS

PDF

39.8 KB Created: 2020-03-29 08:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e52d3e0dfe799ce3e483a78869732b5 SHA-1: 288ca75b66e311f5f38624dc8d98a604712f6b72 SHA-256: 7e3b3747b9654ced0c70e458ee8990a5a33e870f8fce1f18b47859dbf2442f36
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve to manipulate search engine results or redirect users to malicious content. The document body itself is heavily obfuscated and contains a mix of seemingly benign text and embedded URLs, further suggesting a deceptive purpose. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://oakclass.com/uploads/1/3/0/4/130477245/130477245.html#buen+almacenamiento+de+medicamentos+en+casa
    • http://mjkhqbk.pamperpetcare.com/uploads/1/3/0/5/130550974/4960496.pdf
    • http://happiecompany.com/uploads/1/3/0/4/130435962/xuxewegifozalixun.pdf
    • http://neutrality.world/uploads/1/3/0/7/130775023/vuxiv.pdf
    • http://huntergathereronline.com/uploads/1/3/0/5/130538997/lonuloso-fexobepemara.pdf
    • http://whitemountainpoolspas.com/uploads/1/3/0/4/130488227/3b2d68d618a.pdf
    • http://northwesterntaekwondo.com/uploads/1/3/0/8/130813770/6251089.pdf
    • http://dailysteed.com/uploads/1/3/0/5/130539497/5525331.pdf
    • http://haciendagrillrestaurant.com/uploads/1/3/0/7/130739131/f273e05819b.pdf
    • http://bantambloom.com/uploads/1/3/0/6/130621857/ganidigovizu_jobinasatutar_rikibi_pukilojexigo.pdf
    • http://www.cowhorseoutfit.com/uploads/1/3/0/6/130620340/cc150336983f.pdf
    • http://oceanviewlotuvita.com/uploads/1/3/0/7/130776452/7229014.pdf
    • http://solana-beach-retreat.com/uploads/1/3/0/8/130813616/3879586.pdf
    • http://quotebeast.net/uploads/1/3/0/5/130541346/pifazewomup.pdf
    • http://beyondcharisma.org/uploads/1/3/0/5/130588729/laturanixus.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007090.bin
21f31a02197df36b0c9c834c90a65b1e0de69a7f0b383c61cb14ee81d0e71730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 9464 bytes

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