Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa83658a64d2c0ab…

MALICIOUS

PDF

103.0 KB Created: 2022-06-11 12:07:36 +02:00 Authoring application: branashl (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: 40a1d456f1bab939a12436b9801af220 SHA-1: b3debf27f2286d27974e512a9972d30272b2de16 SHA-256: aa83658a64d2c0aba8a99bd9319f98cd66c5594412422451afb8d3522e8e180e
64 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDFs, suggesting a link farm designed to attract traffic. One of the embedded URLs, http://evacdir.com/humpbacks/Y3JhY2tlZCBzdGVhbSB2NC5yYXIgZnJlZSBkb3dubG9hZGh0dHBzOiBzY291dG1haWxzLmNvbSBpbmRleDMwMS5waHAgayBjcmFja2VkIHN0ZWFtIHY0LnJhciBmcmVlIGRvY3J/ZG93bmxvYWR8T2YxYm1Zd1pYeDhNVFkxTkRnNU16RTVNWHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlG..., appears to be a base64 encoded string that likely leads to a malicious archive. The document body is heavily obfuscated and does not provide clear instructions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0048

Heuristics 3

  • 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
  • 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://evacdir.com/humpbacks/Y3JhY2tlZCBzdGVhbSB2NC5yYXIgZnJlZSBkb3dubG9hZGh0dHBzOiBzY291dG1haWxzLmNvbSBpbmRleDMwMS5waHAgayBjcmFja2VkIHN0ZWFtIHY0LnJhciBmcmVlIGRvY3J/ZG93bmxvYWR8T2YxYm1Zd1pYeDhNVFkxTkRnNU16RTVNWHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA/organizedmom?malformations=physiologist&cameo
    • https://rackingpro.com/warehousing/10173/
    • https://ipe888.com/wp-content/uploads/2022/06/derwale.pdf
    • https://www.illuzzzion.com/socialnet/upload/files/2022/06/V61SHGFkRuV4asL22KvP_11_ba95deda607fe589e3ebb0ca9f492530_file.pdf
    • https://donin.com.br/advert/download-keygen-xforce-for-autodesk-rendering-2019-download/
    • http://malenatango.ru/hack-goldenhawk-cdrwin-v3-9k-incl-keygen-orion-zip/
    • https://www.theblender.it/wp-content/uploads/2022/06/chayag.pdf
    • https://nashvilleopportunity.com/omnisphere-2-5-3-crack-with-serial-key-free-download-top/
    • http://titfortech.com/?p=28240
    • https://paddock.trke.rs/upload/files/2022/06/bxHJ9mmKqPTIKMBqgyu7_11_ba95deda607fe589e3ebb0ca9f492530_file.pdf
    • https://www.slowyogalife.com/wp-content/uploads/2022/06/golred.pdf
    • https://www.emitpost.com/wp-content/uploads/2022/06/Urescue_2013_Format_Toolrar.pdf
    • https://stylovoblecena.com/m-audio-torq-1-5-2-serial-22/
    • https://babussalam.id/hsmworks-2016x86-x64-keygen-serial-key/
    • http://tudungnakal.com/virtua-cop-3-high-quality-free-full-version-download/
    • https://luxesalon.ie/2022/06/11/eset-smart-security-v10-0-390-0-final-crack-install-softhound-full-versionl/
    • https://www.5etwal.com/wp-content/uploads/2022/06/de_donkere_kamer_van_damokles_luisterboek.pdf
    • https://moodle.ezorock.org/blog/index.php?entryid=2313
    • https://www.uniting.zone/upload/files/2022/06/kxaRqgar5Qku98VXQjRA_11_ba95deda607fe589e3ebb0ca9f492530_file.pdf
    • http://conbluetooth.net/?p=9857
    • https://encantosdoconde.com.br/advert/l2-crest-maker-download-upd-free/
    • https://www.illuzzzion.com/socialnet/upload/files/2022/06/V61SHGFkRuV4asL22KvP_11_ba95deda607fe589e3ebb0ca9f4925
    • http://www.tcpdf.org
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00001081.bin
a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1081 120140 bytes

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