Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e38002ed027207…

MALICIOUS

PDF

41.1 KB Created: 2020-03-08 10:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c74f8f4594b83c102a2928f5b4232be3 SHA-1: cea8d95fc1909746b99664912e3629dcbc7919b2 SHA-256: 80e38002ed02720791595ec031bad7a46a0902b92cb83c9cf5362b2f9056aa13
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'idsa community acquired pneumonia guidelines 2019' and references the wkhtmltopdf generator, which is often used to create SEO-optimized PDFs for malicious purposes. The primary intent appears to be directing users to a network of potentially malicious websites.

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://purerockcolours.eu/uploads/1/3/0/4/130483205/130483205.html#idsa+community+acquired+pneumonia+guidelines+2019
    • http://krowncustomcues.com/uploads/1/3/0/6/130639313/e7f5a3e.pdf
    • http://jtpropertymanagement.net/uploads/1/3/0/3/130324191/5012698.pdf
    • http://visiondrive.org/uploads/1/3/0/4/130477026/4943041.pdf
    • http://prescottalbum.com/uploads/1/3/0/6/130622101/pisedopakenan.pdf
    • http://lakehuronbathandbody.com/uploads/1/3/0/5/130588173/0afbbbb.pdf
    • http://findyourhairdresser.com/uploads/1/3/0/9/130969206/werolekamufeb.pdf
    • http://exodustcu.com/uploads/1/3/0/5/130551049/126875dc9232e.pdf
    • http://youngprogressivist.com/uploads/1/3/0/3/130323599/jikivixefupeteboviv.pdf
    • http://bridgetownbaroque.org/uploads/1/3/0/8/130815093/f68e7f363d.pdf
    • http://mx.cradleofsanctity.com/uploads/1/3/0/7/130776648/01942c.pdf
    • http://rotoruayachting.club/uploads/1/3/0/2/130272234/fazawuwokoretekokeb.pdf
    • http://flatluxurious.com/uploads/1/3/0/6/130604497/gexefalosepate.pdf
    • http://zollthai.com/uploads/1/3/0/7/130776864/611467.pdf
    • http://younglivingdaily.com/uploads/1/3/0/7/130739538/sutadelemigisesemux.pdf
    • http://privettartgallery.net/uploads/1/3/0/2/130289495/ea65df8b7c.pdf
    • http://www.instytutpilates.com/uploads/1/3/0/5/130590366/fomifizomomopegabope.pdf
    • http://viceroyautotrans.com/uploads/1/3/0/8/130873782/2325443.pdf
    • http://sipthesencha.com/uploads/1/3/0/3/130312993/bewose.pdf
    • http://velvetmazes.com/uploads/1/3/0/3/130323423/5d25be164.pdf
    • http://nataliejimenez.com/uploads/1/3/0/3/130379769/juwikobam.pdf
    • http://bikevaultsystem.com/uploads/1/3/0/6/130639074/nezopifex_zorasuweguju_tozap.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_off000077c3.bin
7231f9fcfacc93221cc341a925118e531a10cc71ed414ed61a1c7326bb0b5760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 7980 bytes

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