Malicious PDF — malware analysis report

Static analysis result for SHA-256 78989a2aa89014ec…

MALICIOUS

PDF

39.1 KB Created: 2020-03-27 04:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f38d63574c95824d2eddebc8ca8a3af2 SHA-1: 240ea435b7df311403598c5754572722ba551a24 SHA-256: 78989a2aa89014ecc7dee587826fd4e5da8899201470ff8221270939bb88af73
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm or SEO spam campaign. The document body, though partially corrupted, suggests a lure related to creating free online crossword puzzles. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the primary malicious activity appears to be directing users to potentially harmful external websites.

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://irieint.com/uploads/1/3/0/6/130640044/130640044.html#crear+crucigramas+online+para+imprimir+gratis
    • http://gzapata-alma.com/uploads/1/3/0/8/130873740/tovilodu.pdf
    • http://spiritualmidwiveslifecoach.org/uploads/1/3/0/7/130776221/jojiloroj_furevalinobor.pdf
    • http://makebigmoneywithmca.com/uploads/1/3/0/6/130620194/xopade.pdf
    • http://taysangels.com/uploads/1/3/0/6/130639958/682d351a4ba0fc6.pdf
    • http://theccorps.com/uploads/1/3/0/2/130272348/aabce0374c.pdf
    • http://notablecreationsco.com/uploads/1/3/0/6/130604789/galejizesomoj.pdf
    • http://vnapoles2.com/uploads/1/3/0/6/130604616/8727443.pdf
    • http://crearjournal.com/uploads/1/3/0/6/130639532/ramawuraki-fubuf-zubimonu-xolunubufovus.pdf
    • http://easlinstitute.org/uploads/1/3/0/3/130323516/a20d33388fef3.pdf
    • http://dukesymowingandmaintenence.com/uploads/1/3/0/7/130776542/5355054.pdf
    • http://fredericksburgroom.com/uploads/1/3/0/2/130270808/regovovej.pdf
    • http://www.donnadoss.com/uploads/1/3/0/7/130739549/bozosedufusuxep-tidof-nobosaz-retujotarikuf.pdf
    • http://marleyreneedesign.com/uploads/1/3/0/2/130287513/dadoxa-redazagag-mijuvu.pdf
    • http://deebeautysupplies.com/uploads/1/3/0/3/130379461/5383209.pdf
    • http://athletesrecycle.com/uploads/1/3/0/8/130874629/d1517.pdf
    • http://business-lifecoaching.net/uploads/1/3/0/9/130969283/vefatebetupomanux.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_off00006cf0.bin
7f4642ac4114284599fcbd00de311aa963aa8649e11e9f8ae0f1627f8ee7af52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 9352 bytes

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