Malicious PDF — malware analysis report

Static analysis result for SHA-256 772c2c78ed19e837…

MALICIOUS

PDF

46.5 KB Created: 2020-04-05 04:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8cd0399e7d4eb1e156475fb6f721820c SHA-1: 08b8ba0bb35e757ed6cec5b5c8ef3efbbe64a6fc SHA-256: 772c2c78ed19e8378711315ed1d6abd968f40d17ad101b4c8dc586315c3e2b3f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external URLs indicates a likely attempt to host or distribute further malicious payloads or phishing content.

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://qualitycareafh.com/uploads/1/3/0/5/130551925/130551925.html#kenwood+model+11+series+3
    • http://yoganique.net/uploads/1/3/0/2/130287866/peluxokemurerig.pdf
    • http://www.littlewine-shop.com/uploads/1/3/0/2/130272295/8245709.pdf
    • http://ferienwohnung-dorheck.com/uploads/1/3/0/7/130740084/5443081.pdf
    • http://ammazen.fr/uploads/1/3/0/2/130287875/cccb688fce62f31.pdf
    • http://findmeahomeutah.com/uploads/1/3/0/7/130775542/0ffb41f6c0f.pdf
    • http://scalatech.co/uploads/1/3/0/5/130551179/6758117.pdf
    • http://moneyspinner4u.com/uploads/1/3/0/6/130621649/notebatenivemuwokabu.pdf
    • http://rosebeltradesolutions.com/uploads/1/3/0/2/130270974/tikejuwolonokip.pdf
    • http://househelpers.city/uploads/1/3/0/2/130289776/265063.pdf
    • http://mariaaventinophotography.com/uploads/1/3/0/6/130605190/6363309.pdf
    • http://masteringjack.com/uploads/1/3/0/5/130589240/nenanulo.pdf
    • http://ns1.choicedirectional.ca/uploads/1/3/0/7/130738780/loxiwawonawu.pdf
    • http://rebeccaewebber.com/uploads/1/3/1/3/131380875/lijoneka_rimavotomi_poxezezitaxepo_rivibo.pdf
    • http://whoiskatrinamitchell.com/uploads/1/3/0/4/130476447/99b4ab0.pdf
    • http://fullcirclecommunications.ca/uploads/1/3/0/8/130813550/5071664.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071aa.bin
705feb07ff9e1d55fa9d8bb6b9ba918d7014df945ed62d4a2d3e4e55faf3f98d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 9268 bytes
font_01_sfnt_off00009435.bin
8fedc9b4a66c4a946427ec6dfe9618b6d370ac7f02d4d593c08a6774760f4164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9435 4376 bytes
font_02_sfnt_off0000a211.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA211 2828 bytes

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