Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43447fe255c789f…

MALICIOUS

PDF

45.6 KB Created: 2020-03-21 20:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db86f8386d4603c07ad80fbf9c036bbd SHA-1: 1ef2ed4014e706929125d9b007b393ef4b156e64 SHA-256: f43447fe255c789f2214fc5d476efcce7aba00088436a4b5606ef9f761ba3057
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted across numerous domains. This pattern is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious nature of the embedded URLs. 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://francescocamuglia.com/uploads/1/3/0/7/130775310/130775310.html#how+to+draw+a+face+mask
    • http://www.angeliquedeclercq.be/uploads/1/3/0/5/130551876/kopajaf.pdf
    • http://whyareyouontheinternet.com/uploads/1/3/0/2/130272095/7529521.pdf
    • http://paigeandelaine.com/uploads/1/3/0/5/130542863/jemar-pesopizorufisub-dijaridufoxidir.pdf
    • http://linuxhelp.tips/uploads/1/3/0/6/130639578/d5466.pdf
    • http://mta-sts.mx.tdsministries.com/uploads/1/3/0/7/130775252/98e63d.pdf
    • http://fl.leadandexcel.com/uploads/1/3/0/5/130539702/4d81e8485.pdf
    • http://decaldenn.com/uploads/1/3/0/5/130542773/be110b9cf18.pdf
    • http://caddoancandle.com/uploads/1/3/0/5/130550754/lozusoko.pdf
    • http://arcc06quebecmetropolitain.com/uploads/1/3/0/7/130740218/3d9ceb87a5929.pdf
    • http://mckinneynewsnow.com/uploads/1/3/0/8/130874238/1be4ed8.pdf
    • http://buysellbell.com/uploads/1/3/0/8/130813834/2341940.pdf
    • http://aomendubowang.f18.ebkf.org/uploads/1/3/0/6/130621283/mepaxijunilimixizen.pdf
    • http://ffhsaz.info/uploads/1/3/0/6/130620278/papivekixidojif-pajiba-punopofamikox.pdf
    • http://happymomyoga.com/uploads/1/3/0/5/130547527/1907524.pdf
    • http://pedicure-an.com/uploads/1/3/0/3/130323630/wifinugix.pdf
    • http://macmarketplace.net/uploads/1/3/0/9/130969768/wafuj-kaxax-deduratiza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e6.bin
bea2e85a722d7c06ba0de91914123d0d947faf8b4a58dd52820a319345c4fed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 7680 bytes
font_01_sfnt_off000092e1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E1 16036 bytes

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