Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f08670dab66efb…

MALICIOUS

PDF

74.8 KB Created: 2020-03-24 14:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dd0661cbd6e317b6616e17b4eca3aba6 SHA-1: f85f3cdfea7a8c1de7a162f86799db8ab961d60e SHA-256: f0f08670dab66efb625225116936be02e164c8f19487d3935d70952d143b23d9
94 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links are likely intended to direct users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body contained only metadata and garbled text, making the link farm the primary indicator of malicious intent.

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://livinginlonelytimes.com/uploads/1/3/1/1/131163620/131163620.html#derivative+of+arctangent+x
    • http://restorativesolutions.nz/uploads/1/3/0/5/130545043/7649347.pdf
    • http://progressrealestatepartners.com/uploads/1/3/0/2/130272385/wewupuladajiku-pokukosewivisup-gukodugidumonos.pdf
    • http://pocketndt.net/uploads/1/3/0/3/130323612/badepose-jafusigukun-retewowegazo-xomebos.pdf
    • http://www.theresanotherwayout.org/uploads/1/3/0/8/130873810/visizowelopimit.pdf
    • http://chefrobotics.com/uploads/1/3/0/3/130379287/dojalemot.pdf
    • http://screenshotup.store/uploads/1/3/0/7/130775136/popebedonisadaf-keteje-digurikisiba.pdf
    • http://mitchellgribbroek.com/uploads/1/3/0/2/130273582/koxewikawipa.pdf
    • http://mikeyhaze.com/uploads/1/3/0/6/130605383/ligosevi_galul_dogaxivaf_pesodogapaf.pdf
    • http://jeffstyr.net/uploads/1/3/0/6/130604904/felatamek_wavejivijiximi.pdf
    • http://mudsweatntears.com/uploads/1/3/1/1/131163984/64972fa5.pdf
    • http://amvendingandcoffeeservice.com/uploads/1/3/0/5/130588940/857778.pdf
    • http://mmfabricademueblesenmaderas.com/uploads/1/3/0/5/130539408/2af225d6928.pdf
    • http://beyoujewelrymn.com/uploads/1/3/0/2/130271057/fawovu.pdf
    • http://artbyvivi.com/uploads/1/3/0/2/130288412/duvemen.pdf
    • http://pgdsweden.biz/uploads/1/3/0/6/130620764/kalirubawebumaw-gazenad-zidorutiler-fadida.pdf
    • http://oldfieldtubeamps.com/uploads/1/3/0/8/130874681/maneba-xewejomis-posipojug-melul.pdf
    • http://allbodiesbeautiful.com/uploads/1/3/0/2/130289265/fepirotepudarafa.pdf
    • http://ductapecreations101.com/uploads/1/3/1/1/131164294/rapiwewepijogiseguv.pdf
    • http://naturallifearchive.org/uploads/1/3/0/7/130776043/jigig.pdf
    • http://groomsbyjagger.com/uploads/1/3/0/3/130323301/7191420.pdf
    • http://writerswhorunretreat.com/uploads/1/3/0/5/130546237/dimudawi_vopelakojosoko_zafepigesisa_juwifuvebi.pdf
    • http://beyoujewelrymn.com/uploads/1/3/0/2/130271057/fawov
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d794.bin
79f453a4d8c7601570a6234a7de1c67e6f29476a0caf41910f51c55d232415c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD794 9432 bytes
font_01_sfnt_off0000fb95.bin
d4ecdfc526ecc70e6b9687a66eb6711ebcc5ac333a68e4ea13b47914ef5c5f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 3208 bytes
font_02_sfnt_off000106f8.bin
40fdf336eeb227fd3d4f1c6b8646464e553c1cc8ca3cc11276820c2e6a2585fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 16176 bytes

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