Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe4b4a0c0554cc3…

MALICIOUS

PDF

52.8 KB Created: 2020-06-10 00:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c88bd68dd5e5d12e8545b08f2232f55e SHA-1: 61a6bf3d4a17c5c487fdcc7dc06210b9b4743421 SHA-256: ebe4b4a0c0554cc3d52bdb88484a628cd7f5463098bddbb4fdb4033dfd444e41
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant portion pointing to domains that appear to be part of a link farm designed for SEO manipulation. One prominent URL, http://74-123-79-170.mgwnet.com/uploads/1/3/1/6/131606065/131606065.html#dragon+ball+gamefaqs, is directly embedded and suggests a lure related to 'Dragon Ball gamefaqs'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for phishing or malware distribution.

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://74-123-79-170.mgwnet.com/uploads/1/3/1/6/131606065/131606065.html#dragon+ball+gamefaqs
    • http://firstroboticsu.com/uploads/1/3/0/6/130604379/1ece55a1e8.pdf
    • http://boyscoutpopcorn.online/uploads/1/3/1/6/131636965/6015885.pdf
    • http://chili-fitness.ch/uploads/1/3/1/4/131437724/3266598.pdf
    • https://favefeg.files.wordpress.com/2020/06/zawatogufixetiluretiged.pdf
    • https://bevixevekev.files.wordpress.com/2020/06/59649975782.pdf
    • https://ritogogopo.files.wordpress.com/2020/06/dojepadejonod.pdf
    • https://liwodadofig.files.wordpress.com/2020/06/fuganefezowoverekul.pdf
    • https://nubiwudowuva456071019.files.wordpress.com/2020/06/tamisewimedorokavuba.pdf
    • https://gukebob.files.wordpress.com/2020/06/78448563747.pdf
    • https://nabelugameka.files.wordpress.com/2020/06/runirubopozafoxoxu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000960b.bin
28832540c7f9efb583dbddbb2dd9738b4ae77d8b1186bef4abba33816a1b34df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 4256 bytes
font_01_sfnt_off0000a503.bin
f5b0e1291b66f1c10f63a5d5fc293a6ab160dcdd2ed4ad6c3c0305cc8c810169		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA503 10152 bytes

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