Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d07d9e75bd90941…

MALICIOUS

PDF

41.4 KB Created: 2020-03-21 16:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 12cdcc34083e2187c861372c8d323b83 SHA-1: 2e6092d2a7e527e5aa4b034955017b70a0d72b8f SHA-256: 2d07d9e75bd90941bfae640e025a0c4ac60ca01cca14af8214cda84f958d0d3c
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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, suggests a lure related to 'Ejercicios fracciones 1 eso interactivos' (Interactive fraction exercises for 1st year secondary school). This indicates a social engineering tactic to drive users to potentially malicious websites. No scripts were extracted from this sample.

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://pampermesandrad.com/uploads/1/3/0/5/130589218/130589218.html#ejercicios+fracciones+1+eso+interactivos
    • http://newstarmuzik.com/uploads/1/3/0/5/130588728/4511489.pdf
    • http://northernlightsrescue.org/uploads/1/3/0/6/130605112/7946908.pdf
    • http://www.bluegumchurch.com/uploads/1/3/0/6/130620618/ee24a473c157.pdf
    • http://daseanjonesforjudge.com/uploads/1/3/1/0/131070307/3c9f517dcc19f9.pdf
    • http://www.canvasonline.in/uploads/1/3/0/6/130639891/dewaz.pdf
    • http://arianneortiz.com/uploads/1/3/0/8/130813779/1037880.pdf
    • http://balansifokus.com/uploads/1/3/0/5/130538891/4ea48b0d81d0ee.pdf
    • http://www.acwri.org/uploads/1/3/0/5/130550664/3126876.pdf
    • http://www.castros-concrete.com/uploads/1/3/0/7/130775792/viwisuwolunipokuma.pdf
    • http://www.beautifulsound.space/uploads/1/3/0/5/130588685/rodote-bizogosa-rofuf-fidap.pdf
    • http://farmingtonpta.org/uploads/1/3/0/4/130483325/e51b88dbc.pdf
    • http://napawinemagazine.com/uploads/1/3/0/4/130483963/rejomedadiku.pdf
    • http://www.kickcancerthebenefit.evakaminsky.com/uploads/1/3/0/3/130313524/1425d9a.pdf
    • http://reliantpayrollandbookkeeping.com/uploads/1/3/0/6/130640091/fidegojep_dopug_zisudemo_gefetuzedidixit.pdf
    • http://doseofdinero.com/uploads/1/3/0/6/130620899/1425761.pdf
    • http://neighbornotary.com/uploads/1/3/0/7/130775649/9351592.pdf
    • http://www.cuoihihi.com/uploads/1/3/0/6/130604354/jolutin-pupuzunegedot.pdf
    • http://renderme3d.net/uploads/1/3/0/4/130494172/3c11a.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/5/130590043/kolofuvu-lovatew-patovir-noxive.pdf
    • http://dovyafriedman.com/uploads/1/3/0/8/130873867/9528aa.pdf
    • http://www.cinemillion.com/uploads/1/3/0/4/130483286/5415873.pdf
    • http://bitcoinersnow.com/uploads/1/3/0/7/130775125/losizejuw_nenodanilivexax_detixev.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_off00007673.bin
a0808fcb0b92731cb163272c1492f77b9b05622171abb8102a22f85ac4d3e5e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 8700 bytes

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