Malicious PDF — malware analysis report

Static analysis result for SHA-256 42926b58d9fac5e7…

MALICIOUS

PDF

42.5 KB Created: 2020-04-01 18:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f78847c7b96156d1ff83f0ef8a47b30a SHA-1: 577292497d13e66f9cbf856c156db5e19397b5f8 SHA-256: 42926b58d9fac5e79ceae553de34517e9e64f60bcce7fec3e1ea099fc5d4eabc
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to coloring pages and the wkhtmltopdf application, suggesting a lure. The primary attack pattern involves directing users to a vast array of linked PDF files hosted on diverse domains, which could be used for SEO spam or to distribute further malware. No scripts were extracted, limiting the analysis of direct payload execution.

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://cuencanogal.com/uploads/1/3/0/4/130483989/130483989.html#dibujos+para+colorear+para+ni%C3%B1os+de+disney+faciles
    • http://sgdpress.com/uploads/1/3/1/0/131070572/9256857.pdf
    • http://conev.info/uploads/1/3/0/6/130639710/kesegolefujen.pdf
    • http://trywoodturning.com/uploads/1/3/0/2/130270747/bapenigiwumixa.pdf
    • http://climatek.org/uploads/1/3/0/4/130476389/pujeleg-xumuwutom.pdf
    • http://droppinhundred.com/uploads/1/3/0/6/130603847/7c53eec.pdf
    • http://www.phktsda.com/uploads/1/3/0/2/130291783/3995394.pdf
    • http://exclusiveservice.it/uploads/1/3/0/2/130271082/jotonorip-rivevif-gunafa.pdf
    • http://msfetish.com/uploads/1/3/0/4/130488073/xorija.pdf
    • http://openheavensglobal.org/uploads/1/3/0/8/130813658/levugulexe-finut-bilupopur.pdf
    • http://brokenjprimitivearts.com/uploads/1/3/0/7/130776582/rutijakawizukoguxil.pdf
    • http://bestwholesale9.com/uploads/1/3/0/5/130540645/pepuvebimaj-wemev.pdf
    • http://bestgeekdeals.com/uploads/1/3/0/7/130739376/bugotalexirubiwate.pdf
    • http://thegoodbeat.com/uploads/1/3/0/3/130323126/3ac1bfd76ea0.pdf
    • http://mobmechanic.com/uploads/1/3/0/5/130589384/e912b1ccf.pdf
    • http://goletacoffeeco.com/uploads/1/3/0/5/130588913/f7be6062.pdf
    • http://realtechsign.com/uploads/1/3/0/7/130775921/radajerobetef-pojorutivufutux-rebumananosofi-zabenokuvuvo.pdf
    • http://usafacpc.afaparents.org/uploads/1/3/0/4/130488312/0824590.pdf
    • http://sajecorp.com/uploads/1/3/0/7/130775557/6959772.pdf
    • http://shopwithkingwalker.com/uploads/1/3/0/6/130620185/9132632.pdf
    • http://bearsinlove.com/uploads/1/3/1/3/131381326/396693.pdf
    • http://detourtowonderland.com/uploads/1/3/0/6/130620975/fadedujulepujod_zefuxum_mufifawa_lulojaros.pdf
    • http://abbu.ch/uploads/1/3/1/3/131379134/vedumutatewid-tifedodane-jumik.pdf
    • http://ballmaniamcr.com/uploads/1/3/0/8/130813757/9459097.pdf
    • http://needacademicwriters.com/uploads/1/3/0/5/130543168/9576101.pdf
    • http://needacademicwriters
    • 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_off00007ca8.bin
a9d6e652186fab1a74fcb6e60c062166cd59014f5160a739a1738b52cb963bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA8 7756 bytes

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