Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbaadbe5f53423f…

MALICIOUS

PDF

70.7 KB Created: 2020-03-23 09:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d9dd2e7cb7925ba9f2d1a2778da1f026 SHA-1: 6352b0556067b85b48f9356307e80f42bd11fb2e SHA-256: cbbaadbe5f53423f6b0176c7e33aa7be47ca48383e1644c9ba20b41c513e7f9d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a link farm, with a high number of external URLs embedded within its structure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous links, primarily hosted on 'ahedits.com'. The document body contains a mix of seemingly unrelated text and embedded URLs, suggesting a deceptive purpose. The primary attack pattern appears to be directing users to a network of potentially malicious or spam-related websites.

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://ksanieuwkerke.com/uploads/1/3/0/8/130814674/130814674.html#que+es+el+nahual+para+los+mayas
    • http://ahedits.com/uploads/1/3/0/6/130621714/sanixebexunudadevoz.pdf
    • http://hostmaster.thedubaiframe.com/uploads/1/3/0/4/130478110/xuzaxuduminu_nalosiludojafu_bulunukupe.pdf
    • http://mberggren.com/uploads/1/3/0/8/130874320/lavedozafole_vezedefesofal_lifukat.pdf
    • http://cpanel.fillogreekbakeshop.com/uploads/1/3/0/2/130289779/zuselajago.pdf
    • http://mycinderellascloset.com/uploads/1/3/0/9/130969950/gafoza.pdf
    • http://drgnwear.club/uploads/1/3/0/5/130543333/tikagekapupuno.pdf
    • http://lashedoutstudio.com/uploads/1/3/0/7/130739747/0bc3fd62999b.pdf
    • http://mail.vinocappuccinobistro.com/uploads/1/3/0/4/130483625/1406105.pdf
    • http://wellingtonjwatches.com/uploads/1/3/0/6/130604859/walumeju.pdf
    • http://blackhawklocksmiths.com/uploads/1/3/0/6/130620822/sogixewarukab.pdf
    • http://www.mydjmbookings.com/uploads/1/3/0/5/130588239/rubego_piwebovajojev_bifoter_duwejasi.pdf
    • http://cherishedrubies.com/uploads/1/3/0/2/130270924/c47c4e091.pdf
    • http://taylortradingcomp.com/uploads/1/3/0/8/130815726/c7fcfd07c9f065a.pdf
    • http://cbfgroupllc.com/uploads/1/3/0/7/130776271/4210124.pdf
    • http://jahornbuckle.com/uploads/1/3/0/7/130740224/nuletik.pdf
    • http://aldenaturalyou.com/uploads/1/3/0/7/130776535/febofowazanugug.pdf
    • http://zellerlifestyle.com/uploads/1/3/0/6/130621298/sozomaxesedaso.pdf
    • http://thesummitx.com/uploads/1/3/0/6/130639321/didubukix_favinewazixosez_ninemo_tesal.pdf
    • http://www.sweethomealamama.com/uploads/1/3/0/8/130874129/4fc3ed68121.pdf
    • http://deanvukelicstonemason.com/uploads/1/3/0/7/130776126/9442116.pdf
    • http://muttleys.ca/uploads/1/3/0/7/130739185/8134408.pdf
    • http://ionrae.net/uploads/1/3/0/7/130740391/3767112.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f0.bin
8d8ae3475558454ed477985a0110a2e77698a700e57deb19a6f790f438868a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F0 10784 bytes
font_01_sfnt_off0000eb9f.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 2652 bytes
font_02_sfnt_off0000f506.bin
6ac92686a23300392c6f351746affe7712910b377d9de8801c675428a0d8a9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 16096 bytes

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