Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04ba939e2b98a8f…

MALICIOUS

PDF

37.0 KB Created: 2020-04-03 10:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30ef5978dd2c5fbddabb38797450676e SHA-1: 050df7c61e4d4f7f7fac9f21111033c9859cb5e1 SHA-256: c04ba939e2b98a8fe96685b7a725e9034deb6d2d75b272fb4a5182800e70f491
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://californiacraftservices.com/uploads/1/3/0/2/130272649/130272649.html#calcular+el+minimo+comun+multiplo+de+tres+numeros, and numerous others hosted on various domains, suggest a link farm or redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

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://californiacraftservices.com/uploads/1/3/0/2/130272649/130272649.html#calcular+el+minimo+comun+multiplo+de+tres+numeros
    • http://wildernessroots.com/uploads/1/3/1/3/131379121/tiruxizaroki_xogitiwuvowe_vowojuterolo.pdf
    • http://massantnicolau.com/uploads/1/3/0/7/130775644/rabagu_zenug_debav_liforusagokogof.pdf
    • http://smithcain.com/uploads/1/3/1/4/131408620/xanewewexuwuk.pdf
    • http://verybusykid.com/uploads/1/3/0/5/130539756/voxexizafosadu-nadowunowi.pdf
    • http://digimgen.com/uploads/1/3/0/6/130639373/7085127.pdf
    • http://noah-alexander.com/uploads/1/3/0/6/130620626/8317180.pdf
    • http://fullmoondrycleanerllc.com/uploads/1/3/0/6/130621903/4967770.pdf
    • http://prace-zahranici.eu/uploads/1/3/1/4/131410818/9885504.pdf
    • http://weddingwithabudget.com/uploads/1/3/0/5/130539979/faseposejumobamon.pdf
    • http://rb-animations.com/uploads/1/3/0/4/130488096/d7bee63e02.pdf
    • http://extrahandstoday.com/uploads/1/3/1/0/131070377/navorodudifab-rubun.pdf
    • http://generalstoreband.com/uploads/1/3/0/3/130323624/gazosa.pdf
    • http://hhehenryhamerenterprises.com/uploads/1/3/0/4/130435631/74848a0b0551084.pdf
    • http://bestsoftballuniforms.com/uploads/1/3/0/9/130969373/433a0.pdf
    • http://dialysismenuplanner.net/uploads/1/3/0/4/130483552/55826c.pdf
    • http://credit-default-swap-attorneys.com/uploads/1/3/1/1/131164414/dilawekol-japuduriket-lebov.pdf
    • http://www.anafaros.se/uploads/1/3/0/7/130775727/8477985.pdf
    • http://tarawinona.art/uploads/1/3/1/4/131438808/6b0de4079d4ec73.pdf
    • http://yourmarpr.info/uploads/1/3/0/6/130604892/4717520.pdf
    • http://alnouraldaem.com/uploads/1/3/1/4/131409236/fiwomodo.pdf
    • http://negotiationprofessionals.org/uploads/1/3/0/5/130539728/7a0656394b5e2.pdf
    • http://immigrationpof.com/uploads/1/3/0/8/130874110/fumojavelokeva_jarozejug.pdf
    • http://allprochamps.com/uploads/1/3/0/6/130604193/zipirub.pdf
    • http://margaretjeanne.com/uploads/1/3/1/0/131070381/tizobafoxu_wosunugumo.pdf
    • http://uterasim.com/uploads/1/3/0/4/130489157/5252627.pdf
    • http://allprochamps.com/uploads/1/3/0/6/130604193/zipirub
    • 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_off000067ad.bin
9e6bc6ad1910489efff2c756c7b5aa11eb8e9311f1886c60adaa48ac50be797f
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AD 7660 bytes