Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd6c61e8d2611e8…

MALICIOUS

PDF

40.3 KB Created: 2020-05-15 07:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4e931fe9a11ab25c9dca636ba50274a SHA-1: 577e54f9e4d3a0b4cc1d23761f56800e822b6d2f SHA-256: 4cd6c61e8d2611e883ee9971cbb95a6181102e84e28f6c9a2d760b8848018d14
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm, designed to redirect users to various websites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The document body, though partially corrupted, contains references to an annual report, likely a lure to disguise the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mikeleespeaker.com/uploads/1/3/0/7/130775135/130775135.html#helios+towers+africa+annual+report+2018
    • http://stoneedgesharpening.net/uploads/1/3/0/5/130551464/kasom-tolife-xibofev-jopize.pdf
    • http://affordablemarketingsolutions.net/uploads/1/3/1/4/131437775/2753662.pdf
    • http://chrishinesfishing.com/uploads/1/3/1/6/131637302/5379284.pdf
    • http://biocharreclamation.com/uploads/1/3/0/4/130475981/0afc8e02ded2b.pdf
    • http://jesuspalma.com/uploads/1/3/1/4/131407369/2a5abaaea3c95.pdf
    • http://corkemergencyvets.com/uploads/1/3/0/4/130488994/9265fe.pdf
    • http://silviaperezinsurance.com/uploads/1/3/1/1/131164109/fusameva.pdf
    • http://shelbymachineproducts.com/uploads/1/3/1/1/131164471/dc252034.pdf
    • http://100alicestories.org/uploads/1/3/0/6/130620757/tejejofavobotofolo.pdf
    • http://bearvalleymensministry.com/uploads/1/3/1/4/131411896/80dbb0e22.pdf
    • http://millteacher.com/uploads/1/3/0/5/130550895/bitimiwiwe_pajabimo.pdf
    • http://bernicola.com/uploads/1/3/0/5/130540193/giwiribawoditasesa.pdf
    • http://parkside705.com/uploads/1/3/0/5/130589423/dbe1c47d4c.pdf
    • http://vantagepointsurvival.com/uploads/1/3/1/0/131070291/kafedon.pdf
    • http://majickis.com/uploads/1/3/0/6/130621061/ba5edbd283d9.pdf
    • http://earthandskyglassworks.com/uploads/1/3/0/5/130590138/xumokexekojajalemuta.pdf
    • http://lafranceathome.com/uploads/1/3/1/6/131636839/dd2501a0ad616.pdf
    • http://voyagescimatur.com/uploads/1/3/0/4/130483263/gulodug_mexikamix_pufelopenaw.pdf
    • http://madeleinemfuru.com/uploads/1/3/0/4/130491947/sanesomuxafavuz-wiloweris-nopopilugazode-xatalojagi.pdf
    • http://jllcapitalmarkets55westmonroe.com/uploads/1/3/0/5/130551294/3288674.pdf
    • http://paulsonquispe.com/uploads/1/3/1/4/131452923/3102335.pdf
    • http://sistersofsolace.org/uploads/1/3/1/4/131437576/1116200.pdf
    • http://docfourlife.com/uploads/1/3/1/8/131871583/xofijanux.pdf
    • http://himachalculturalvillage.com/uploads/1/3/0/5/130590177/pikoxixipitulo-xumotesig-dexokosurasetut.pdf
    • http://familylawfolks.com/uploads/1/3/0/3/130313224/jilegaxobu-peset.pdf
    • http://himachalculturalvillage.com/uploads/1/3/0/5/130590177/pikoxixipitulo-xumotesig-dexokosu
    • 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_off00006fcf.bin
79d914fa0979db24dd3dd901f5a20a976332cc9d4d2a4c1df442c9715184c628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 10868 bytes

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