Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1da60108889f97…

MALICIOUS

PDF

42.7 KB Created: 2018-12-15 08:10:47 +03:00 Authoring application: FineReader (via -)
MD5: b0116c43db7e99e57b15828bece4431f SHA-1: 54eadbeefab6c02a8f7c61467dd963d6636a7427 SHA-256: 2a1da60108889f975551a448b15f2725a562cc0172631d6c116eb5fe0d0ef61a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains an embedded script payload, flagged by high-severity heuristics. The ML classifier also indicated maliciousness with a high score. The embedded URIs, such as http://www.gorillawalker.com/die-meistersinger-von-n-rnberg-wwv-96-chorus-score-a3154.pdf, likely serve as lures or download locations for further malicious content. The presence of an embedded script suggests an attempt to execute malicious code upon opening or interaction with the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8698

Heuristics 4

  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www.gorillawalker.com/die-meistersinger-von-n-rnberg-wwv-96-chorus-score-a3154.pdf
    • http://www.gorillawalker.com/my-first-book-of-portuguese-words-bilingual-picture-dictionaries-multilingual.pdf
    • http://www.gorillawalker.com/the-romantic-a-novel.pdf
    • http://www.gorillawalker.com/the-last-zombie-inferno-gn-2-the-last-zombie-inferno.pdf
    • http://www.gorillawalker.com/fusion-management-harnessing-the-power-of-six-sigma-lean-iso.pdf
    • http://www.gorillawalker.com/natural-enemies-of-terrestrial-molluscs.pdf
    • http://www.gorillawalker.com/jersey-city-new-jersey-images-of-america-arcadia-publishing.pdf
    • http://www.gorillawalker.com/coming-of-age-in-samoa-a-psychological-study-of-primitive.pdf
    • http://www.gorillawalker.com/introduction-to-embedded-systems-using-microcontrollers-and-the-msp430.pdf
    • http://www.gorillawalker.com/what-is-good-the-search-for-the-best-way-to.pdf
    • http://www.gorillawalker.com/morimoto-the-new-art-of-japanese-cooking-morimoto-os.pdf
    • http://www.gorillawalker.com/opposing-viewpoints-series-sports-and-athletes-paperback-edition-opposing-viewpoints.pdf
    • http://www.gorillawalker.com/vacaciones-en-espanol-2-holidays-in-spanish-2-el-camino.pdf
    • http://www.gorillawalker.com/brainiac-adventures-in-the-curious-competitive-compulsive-world-of-trivia.pdf
    • http://www.gorillawalker.com/food-production-and-crisis-in-the-west-african-savannah-australian.pdf
    • http://www.gorillawalker.com/principles-of-cardiac-and-vascular-computed-tomography-1e-principles-of.pdf
    • http://www.gorillawalker.com/primordial-characters.pdf
    • http://www.gorillawalker.com/responding-to-literature-a-step-by-step-guide-for-student.pdf
    • http://www.gorillawalker.com/gilberto-freyre-social-theory-in-the-tropics-the-past-in.pdf
    • http://www.gorillawalker.com/matsuya-japanese-crest-designs-cd-rom-and-book-dover-electronic.pdf
    • http://www.gorillawalker.com/mcat-quick-review-anatomy-physiology-word-roots-quick-review-notes.pdf
    • http://www.gorillawalker.com/das-rheingold-libretto-german-edition.pdf
    • http://www.gorillawalker.com/does-god-listen-to-rap-christians-and-the-world-s.pdf
    • http://www.gorillawalker.com/artemisia-gentileschi-the-language-of-painting.pdf
    • http://www.gorillawalker.com/chinese-medicine-and-intercultural-philosophy-theory-methodology-and-structure-of.pdf
    • http://www.gorillawalker.com/mel-bay-93235-electric-bass-method-volume-2-book.pdf
    • http://www.gorillawalker.com/agnosticism-a-very-short-introduction.pdf
    • http://www.gorillawalker.com/the-little-book-of-color-healing-energy.pdf
    • http://www.gorillawalker.com/green-cities-of-europe-global-lessons-on-green-urbanism.pdf
    • http://www.gorillawalker.com/an-introduction-to-geographical-information-systems-3rd-edition.pdf
    • http://www.gorillawalker.com/futanari-paradise-futa-on-female-female-on-female-menage-shemale.pdf
    • http://www.gorillawalker.com/clinical-neurosonography-ultrasound-of-the-central-nervous-system.pdf
    • http://www.gorillawalker.com/commercial-arbitration.pdf
    • http://www.gorillawalker.com/the-sound-of-war-memoirs-of-a-cbc-correspondent.pdf
    • http://www.gorillawalker.com/once-tempted-a-silver-creek-novel.pdf
    • http://www.gorillawalker.com/when-the-giants-were-giants-bill-terry-and-the-golden.pdf
    • http://www.gorillawalker.com/algeria-an-entry-from-charles-scribner-s-sons-africa-an.pdf
    • http://www.gorillawalker.com/nursing-assistant-student-manual-2004-6th-edition.pdf
    • http://www.gorillawalker.com/practical-outboard-motorboat-building-and-operation-its-history-and-development.pdf
    • http://www.gorillawalker.com/weiss-ratings-guide-to-life-health-and-annuity-insurers-summer.pdf
    • http://www.gorillawalker.com/jersey-city-new-jersey-images-of-ameri
    • 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
embedded_pdf_script_0000150b.bin
702461406ea71404c98816e439d79d4079d1673cf5ee4f695d799230e281afa3
pdf-embedded-script PDF decompressed stream script payload at offset 0x150B 13468 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).