Malicious PDF — malware analysis report

Static analysis result for SHA-256 95227fb9527f5ea0…

MALICIOUS

PDF

32.4 KB Created: 2020-03-20 12:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dbfe724cc02a823b438222e9f1cb4d90 SHA-1: 8e40dc0a1b84044627b6b196b276004864602586 SHA-256: 95227fb9527f5ea071a5c25f5c8ca139ac20b68a69615d61b8bb490598a1eff7
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious content. The document body, though partially corrupted, suggests a lure related to 'subscription' and 'fiscal notes'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, pointing to a likely phishing or malware distribution scheme.

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://armorgrind.org/uploads/1/3/0/6/130621940/130621940.html#suscripcion+revista+notas+fiscales
    • http://www.allhallowscanine.com/uploads/1/3/0/2/130289474/pitobowu.pdf
    • http://bbvillahallau.com/uploads/1/3/0/2/130271177/8019195.pdf
    • http://durableevolution.com/uploads/1/3/0/6/130620673/logire.pdf
    • http://www.yourmichiganlandscaper.com/uploads/1/3/0/3/130323110/5902019.pdf
    • http://cpanel.readingpowerinc.org/uploads/1/3/0/3/130324418/kobov.pdf
    • http://opiatefreemeds.com/uploads/1/3/0/5/130589250/611325.pdf
    • http://mx.americascoresseattle.org/uploads/1/3/0/2/130270843/vabutopap_bitexi_papurufogided_pozerakatakunir.pdf
    • http://drswanod.com/uploads/1/3/0/5/130542907/derawukofero.pdf
    • http://aaceconsulting.org/uploads/1/3/0/2/130272488/pevamamatij_mewari_juwoj_waxiv.pdf
    • http://pruned.in/uploads/1/3/0/3/130313434/rizaz_pinogotunizozuf_vuvajidiwi_jawagajekek.pdf
    • http://mminstitutedsn.com/uploads/1/3/0/8/130813132/1977674.pdf
    • http://www.catterychivers.com/uploads/1/3/0/6/130621789/1a611aeb.pdf
    • http://iodpmsolutions.com/uploads/1/3/0/4/130490155/5369413.pdf
    • http://mail.asips.net/uploads/1/3/0/2/130271159/321163e.pdf
    • http://www.christinasbridals.com/uploads/1/3/0/4/130435589/jonirigonixupave.pdf
    • http://gaiatravel.net/uploads/1/3/0/4/130478203/fitinitilalogodemexo.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_off00005674.bin
e6812818259db3f4ff8a58c96234966696f8012528ae3abfa81a2a7bd6afe02d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5674 7596 bytes

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