Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe8c01bf07174b7…

MALICIOUS

PDF

32.7 KB Created: 2020-03-29 22:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5d5dcdc4dff693370f4d0f4b4a101fe SHA-1: 5d206595602083ca6e935ba56053afa15182734e SHA-256: 8fe8c01bf07174b731c6c1bd8fe1d1a12278febf66cee47e5693892f4ccd4c14
94 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body contains text related to 'Dell powerconnect 2724 default admin password' and 'wkhtmltopdf', suggesting a potential lure or obfuscation tactic. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content hosted on numerous subdomains.

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://wcd-qnv77h4.mgh-r.ch/uploads/1/3/0/7/130738751/130738751.html#dell+powerconnect+2724+default+admin+password
    • http://bottlerocketz.com/uploads/1/3/0/8/130814124/budagej.pdf
    • http://tsuhansu.com/uploads/1/3/0/7/130776808/90311803.pdf
    • http://tarjetaspostalesymasbakerstore.com/uploads/1/3/0/6/130603847/8608639.pdf
    • http://forthekidsroofing.com/uploads/1/3/0/6/130621516/419f37.pdf
    • http://placitasdemocratsandfriends.com/uploads/1/3/0/4/130476062/badogudes.pdf
    • http://braveandgentle.org/uploads/1/3/0/3/130323612/doxeriminova_vupolufivaxog_gukolotenaj.pdf
    • http://mymusicshowcase.com/uploads/1/3/0/7/130775735/jamoxanut.pdf
    • http://marquardeditorial.com/uploads/1/3/0/7/130775012/bokajagovowador-rudadaxan-rumuw.pdf
    • http://sugarloafcelebration.com/uploads/1/3/0/3/130379407/jazevis_fonoxepexijejav_jawin.pdf
    • http://addboutiqueok.com/uploads/1/3/0/5/130542718/0f725c18592.pdf
    • http://sincityinktattoo.com/uploads/1/3/0/7/130739445/buxapixi.pdf
    • http://nelsonkimeofficial.com/uploads/1/3/0/2/130271126/8958680.pdf
    • http://cenalisv.com/uploads/1/3/0/5/130589189/8943367.pdf
    • http://viphostnz.com/uploads/1/3/0/7/130775341/wunem.pdf
    • http://boldravenfx.com/uploads/1/3/0/6/130620439/bafik-rumubepirux-kotux-rikamiluwe.pdf
    • http://riskmarcadvisors.net/uploads/1/3/0/5/130590383/7794627.pdf
    • http://bestcutsvalleyhi.com/uploads/1/3/0/3/130324351/2191.pdf
    • http://nautifoods.com/uploads/1/3/1/3/131383594/7dc5850778.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_off00005ac6.bin
22a801cb56ed57279522d2ff6cf8f9d33ff9194af2178fdb7cd8f01669bc952b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC6 6556 bytes

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