Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cee6c5a52d0751…

MALICIOUS

PDF

40.8 KB Created: 2020-10-10 20:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ef286f1c6df5e75c3acec98c6aa44ca SHA-1: eba7c93ff2679da80f71f00a4bf3b15205a83ba9 SHA-256: f3cee6c5a52d0751ac2e371c87c78c0b73b0e20376ec009b24fae32a0be2e8a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. The primary attack pattern appears to be directing users to potentially harmful websites, possibly for phishing or to host further malicious content.

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.com/pify?keyword=murrieta+public+library+hours In PDF document text
    • http://danulosob.daynasdogsitting.com/uploads/1/3/1/4/131453336/6954922.pdfIn PDF document text
    • http://gokuwe.fpcommunitygarden.net/uploads/1/3/0/8/130814682/vajinuwizuvob_marapar_pafuxa.pdfIn PDF document text
    • http://mesix.climateviews.com/uploads/1/3/1/8/131858540/rigabepaxed.pdfIn PDF document text
    • http://files.sportfishingdalsland.com/uploads/1/3/2/6/132696274/fd45c.pdfIn PDF document text
    • http://files.willowparkcitizens.org/uploads/1/3/1/4/131454316/3763409.pdfIn PDF document text
    • https://site-1039897.mozfiles.com/files/1039897/45202841218.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/84916311236.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/1/0485/2501/7250/files/saeco_intelia_deluxe_hd8759_47_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5540/5992/files/watch_spider_man_homecoming_online_putlockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/kate_mckean_howard_morhaim_literary_agency.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1296/3482/files/shadow_movie_quiz_answers_easyquizzy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6352/9638/files/kepikufir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3079/7224/files/beaver_house_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/how_to_write_code_in_ubuntu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/napoleon_a_life.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_off000060a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 5268 bytes
SHA-256: 0e38bfd4f3faf58c9e8e80f1ac4fc56b48ca9cfe01f83276e24d057b3e3f557c
font_01_sfnt_off00007289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7289 10352 bytes
SHA-256: d230d289722c4cde29dd562e6d65381332a58d9c01b68088113c62e135fe64ff

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