Malicious PDF — malware analysis report

Static analysis result for SHA-256 29de9a9b20ed5123…

MALICIOUS

PDF

44.3 KB Created: 2020-03-25 05:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1c4663be38fc6a8e3b2d885244fc782 SHA-1: 913e48fe52af278c26088f9f6275bc85d2a65252 SHA-256: 29de9a9b20ed512310dbbc2e82326927f18282596cea9203196a1963cba9eda3
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content through a network of compromised websites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to lead users to potentially harmful content.

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://montanapurewood.com/uploads/1/3/0/7/130738673/130738673.html#ejercicios+de+rango+desviacion+estandar+y+varianza
    • http://missprentice.com/uploads/1/3/0/5/130539102/ganutawa.pdf
    • http://hannahhaleymakeup.com/uploads/1/3/0/7/130776808/e60dc6.pdf
    • http://hostmaster.agshield.com/uploads/1/3/0/2/130272569/notatisika_dewidadebut_xidilerazodeg_ruresavijosogo.pdf
    • http://www.dpsgroup-int.com/uploads/1/3/0/8/130814245/sebosuwom_rowukisexo_zepuro.pdf
    • http://rainbibleschool.net/uploads/1/3/0/6/130621557/rajuxe_najokekepube_luwolaxawul.pdf
    • http://www.jamicafundraise.com/uploads/1/3/1/0/131070431/jesonarowesom.pdf
    • http://kimjodashian.com/uploads/1/3/1/1/131164077/9338095.pdf
    • http://nevermoreacres.com/uploads/1/3/0/5/130540085/21146.pdf
    • http://www.copleysound.com/uploads/1/3/0/2/130289773/273973.pdf
    • http://madisonelijohnson.com/uploads/1/3/0/5/130550846/positowego.pdf
    • http://uralmotorcyleparts.com/uploads/1/3/0/4/130436288/221ac3323.pdf
    • http://www.rentandroid.net/uploads/1/3/0/6/130604466/9f498996e783.pdf
    • http://temperanceaction.com/uploads/1/3/0/6/130620845/88a4f2409f.pdf
    • http://www.linefasteraune.no/uploads/1/3/0/7/130738956/2218115.pdf
    • http://expertpeintureindustrielle.org/uploads/1/3/0/2/130273733/537901d4cdd47.pdf
    • http://www.michaeladamsauthor.shirehistory.org/uploads/1/3/0/5/130551625/7f6196e4.pdf
    • http://emdr-rhode-island.com/uploads/1/3/0/3/130313056/29cae866c11b5.pdf
    • http://languageofrecovery.us/uploads/1/3/0/4/130475959/kutafawugiwi.pdf
    • http://hostmaster.df-cs.co.uk/uploads/1/3/0/7/130775084/bipinogeko.pdf
    • http://rosestatetheatre.org/uploads/1/3/0/6/130639164/pumujojugib.pdf
    • http://austinvoicelady.com/uploads/1/3/0/4/130490245/vavozediwewovizu.pdf
    • http://pcbchain.co.uk/uploads/1/3/0/2/130272318/c2298809f155f.pdf
    • http://meridianconsultinggroup.org/uploads/1/3/0/2/130274291/lexaxibejojarakebe.pdf
    • http://meridianconsultinggroup.org/uploads/1/3/0
    • 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_off0000738b.bin
17e482e03fae4de0957fb84c81220bb77739d135e80a4cc60a73b3b7d7fdeafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738B 9912 bytes
font_01_sfnt_off0000970d.bin
e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970D 2884 bytes

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