Malicious PDF — malware analysis report

Static analysis result for SHA-256 48390e8cd4b36d2c…

MALICIOUS

PDF

65.4 KB Created: 2020-04-06 13:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ccda8162930d3628e775e515012f8496 SHA-1: 380472da6be532bf35edf6f9d7aa9a1c272f48a2 SHA-256: 48390e8cd4b36d2c6e4272be1ba4a539f5595643c8c9fa3f886c0a5a14d98a63
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary attack pattern appears to be a dropper that leverages these external links to potentially download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9024792-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9024792-0
  • 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://arkatypesymbology.com/uploads/1/3/0/5/130543170/130543170.html#calcular+el+volumen+de+un+prisma+triangular+oblicuo
    • http://woodsorrelusa.com/uploads/1/3/0/4/130435592/85901.pdf
    • http://gracezmham.com/uploads/1/3/0/5/130590384/sezawuseladijafu.pdf
    • http://xbysantana.com/uploads/1/3/1/4/131407995/8f8856.pdf
    • http://ipcommunicator.net/uploads/1/3/0/2/130287799/e7ed3.pdf
    • http://theles-bijoux-de-chris-de-paris.com/uploads/1/3/0/8/130813965/9a8aee9975.pdf
    • http://buxidesign.com/uploads/1/3/1/3/131381237/gupukozilokupo.pdf
    • http://elektro-serwis.biz/uploads/1/3/0/4/130488619/fixiniravelavim.pdf
    • http://laroseartclasses.com/uploads/1/3/0/3/130324324/859386.pdf
    • http://new-jersey-trucking-attorneys.com/uploads/1/3/0/5/130588656/a649b3182fe1ee.pdf
    • http://loadspecialists.com/uploads/1/3/0/6/130639495/desakoleripezunux.pdf
    • http://vinnyshomeinspections.net/uploads/1/3/1/3/131380612/1324745.pdf
    • http://destinationspaniels.com/uploads/1/3/0/5/130589415/7585658.pdf
    • http://jackedegosfitness.com/uploads/1/3/1/4/131407654/verob_pemaxaleniba.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a3.bin
0233a30d52ae6b58ac6ca5037e3beddfdad2440e24a2cebf3cd7282df968b790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 12732 bytes
font_01_sfnt_off000083b7.bin
48f405b6f30115a43d95103fa95d1cd20d8ff984d2ae774eee793f763cf311d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 10560 bytes
font_02_sfnt_off0000a6a8.bin
9e06c65605aefeb5aeb29e124f9924ec5bd430da26318803c768d0e0f459c6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A8 9084 bytes
font_03_sfnt_off0000c3fe.bin
aae4d14b29e6957dc2271726d4047f15b2e2a13adb6b3e48c347e6f8248e3469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 18136 bytes
font_04_sfnt_off0000dfa0.bin
92bf7f4e5f0606b29e2232d2f95af58aea38299e73160e44490c65bec0f219f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 8380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.