Malicious PDF — malware analysis report

Static analysis result for SHA-256 544c1d19f09b4e1f…

MALICIOUS

PDF

37.7 KB Created: 2020-03-21 15:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5444ebdd56de94b258e0dd514b01d1ff SHA-1: f664d5c6888bba7cd5d22c1a1dc806ab4c024a44 SHA-256: 544c1d19f09b4e1f4263814b673ddf829b31fd577b485c31f5fcdef0d3eb2761
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to educational planning and mentions the wkhtmltopdf tool, suggesting a potential lure. The primary attack pattern involves redirecting users to a vast collection of other PDF files hosted across numerous domains. No scripts were extracted from this sample, limiting the ability to determine further payload delivery or execution mechanisms.

Heuristics 3

  • 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
  • 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://jongpancingbetta.com/uploads/1/3/0/4/130489102/130489102.html#planeaciones+segundo+grado+primaria+tercer+trimestre
    • http://valaisparapente.ch/uploads/1/3/0/7/130775515/kowivovevawopokilaba.pdf
    • http://whitneydavishoustonlaw.com/uploads/1/3/0/5/130551087/varetamideme_mixojojul.pdf
    • http://homesteadmediaonline.com/uploads/1/3/0/6/130605289/katokejo.pdf
    • http://propertycarelandscaping.com/uploads/1/3/0/6/130621238/4cf14c6.pdf
    • http://www.artifextattoosupply.com/uploads/1/3/0/5/130551309/miwezunije.pdf
    • http://community-band.com/uploads/1/3/0/7/130738553/8927745.pdf
    • http://www.halfwit.biz/uploads/1/3/0/2/130273790/nikokomem.pdf
    • http://cozycubby.com/uploads/1/3/0/5/130589454/femafumi-gigonupi-rilime-vuvibolem.pdf
    • http://tinyyetmightydesigns.com/uploads/1/3/0/7/130776737/1194453.pdf
    • http://chilitrend.com/uploads/1/3/0/7/130776008/bobagijapasatiris.pdf
    • http://tjfitness.net/uploads/1/3/0/3/130379239/5546416.pdf
    • http://susanmastalsfoundation.org/uploads/1/3/0/6/130639183/kamakar-pajafodavetipel-vakotox.pdf
    • http://thaddeusnhizfamily.com/uploads/1/3/0/4/130476538/7781489.pdf
    • http://www.extddivingcenter.com/uploads/1/3/0/7/130775276/nonotedatewamow.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/5/130589318/2011945.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_off00006871.bin
7c37ef6a990e1fa462042555c21114490c9c15f55cdcba94f9568ed15d6aa362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 8496 bytes

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