Malicious PDF — malware analysis report

Static analysis result for SHA-256 f948bc76702d0135…

MALICIOUS

PDF

36.8 KB Created: 2020-05-23 08:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0f407c8514a077a902592042ac0e1b SHA-1: 0025256d053eb2a3202b24595e07ef0c3718c2ed SHA-256: f948bc76702d0135efd1269cea61b059e45ce3a00132d52b07c332be84851c0b
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains obfuscated text and embedded URLs, suggesting an attempt to redirect users to potentially malicious sites for SEO spam or further payload delivery.

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://jy-la.org/uploads/1/3/1/4/131407945/131407945.html#dict%25C3%25A9e+ce2+en+ligne
    • http://sunshineslut.com/uploads/1/3/1/4/131407818/7b1c5bab8.pdf
    • http://mecaservices44.fr/uploads/1/3/0/5/130551417/d95d23b62c11127.pdf
    • http://pkupursuits.org/uploads/1/3/1/4/131407887/dilolabewukedelese.pdf
    • http://janisduncan.com/uploads/1/3/0/5/130550693/vudut-wamefi-musagepanosil.pdf
    • http://mail.politicsarchive.com/uploads/1/3/1/4/131406837/6758231.pdf
    • http://myamazingwatches.com/uploads/1/3/0/7/130775515/xazozoloz-bereri-kuvejokurufi.pdf
    • http://mail.kulitjerukbali.net/uploads/1/3/0/7/130739712/0b9ff2061a144be.pdf
    • http://twoheartssalukis.com/uploads/1/3/1/6/131636886/xexaxutisibufugew.pdf
    • http://toyotacikarangbekasi.com/uploads/1/3/0/2/130291592/670eb3a.pdf
    • http://cozycottagepreschool.com/uploads/1/3/1/3/131384336/458243e.pdf
    • http://aboutmelissawelch.com/uploads/1/3/1/6/131637070/6180773.pdf
    • http://hmannesfaserninc.com/uploads/1/3/1/4/131483421/9459361.pdf
    • http://moriahtelecoms.org/uploads/1/3/1/3/131384568/juruluk_zosekoj_zipisa_doxozom.pdf
    • http://palmettohouseworx.com/uploads/1/3/1/3/131382786/43dddf.pdf
    • http://twinsservicesinc.com/uploads/1/3/0/6/130604872/sujonexadeza-rojiwivapam.pdf
    • http://robbstministorage.com/uploads/1/3/1/8/131871405/8916935.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_off00006214.bin
0303ce4ce54c82605435bb8084a6ef54863804ca40ff8ebe9b89de0da563e25a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 11396 bytes

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