Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64773e199938382…

MALICIOUS

PDF

34.6 KB Created: 2020-03-11 13:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2fa67a0445f5f526148f1965edf635a SHA-1: 2c2152ca69d87ddf0b2b6b8cfd515c1c9b0c8e4c SHA-256: a64773e199938382cf03b2b9afce461813b2bdd34b0dfb96a1f94a42ff4ca233
94 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs that point to other PDF files hosted on various domains. This suggests the primary purpose of this document is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

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://lovesmystate.com/uploads/1/3/0/5/130551651/130551651.html#chiller+york+ylaa
    • http://shepherdslair.com/uploads/1/3/0/6/130621059/putusolegazobezul.pdf
    • http://familyhairdesignwh.com/uploads/1/3/0/7/130739028/1839367.pdf
    • http://myoars.org/uploads/1/3/0/5/130551338/duzokipone_fixijijawe.pdf
    • http://windowfarms.info/uploads/1/3/0/6/130605447/1608169.pdf
    • http://catchwalleyes.com/uploads/1/3/0/5/130550731/2261bd1500c13.pdf
    • http://absoluteventoparty.com/uploads/1/3/0/2/130288006/tegape_zidonibirad_takoso.pdf
    • http://gajonesconstruction.ca/uploads/1/3/0/5/130547527/2096130.pdf
    • http://remsofflorida.com/uploads/1/3/0/4/130435546/lelisiwifi_sipovaf_mozalanoguwor_buwixirudafe.pdf
    • http://mynorthstarcares.com/uploads/1/3/0/2/130288630/996184050e3.pdf
    • http://www.doitforyoufitness.com/uploads/1/3/0/6/130603725/vowinegibufab_lofawosoxozesu_xaxepija_bipebizosu.pdf
    • http://nashvilleperformancepsych.net/uploads/1/3/0/2/130289583/4454640.pdf
    • http://myflstudio.com.au/uploads/1/3/0/2/130272909/750c6a1f516801.pdf
    • http://delivery.hoardspot.com/uploads/1/3/0/7/130775893/retagikenisigudafol.pdf
    • http://labotanicaazul.com/uploads/1/3/0/6/130621488/4983104.pdf
    • http://www.zakon-o-delovnih-razmerjih.info/uploads/1/3/0/6/130621481/vakaxisotufiwagu.pdf
    • http://www.mcirish.com/uploads/1/3/0/7/130740166/99ba0.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe2.bin
5fe984ba38a22ab73b9bd8e72fdfd11d7c73f5add848993fb3fbe873719bef3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE2 7660 bytes

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