Malicious PDF — malware analysis report

Static analysis result for SHA-256 1708ba716bef2497…

MALICIOUS

PDF

50.6 KB Created: 2020-03-30 05:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82ab0e07364937ac6e213fbbc79f407e SHA-1: e927e7f82bcc7ef90bd6a1218037e9f420be9da6 SHA-256: 1708ba716bef249763daa622920ae0b7602d6a69fddbeb86d68c546b6fb256b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by an ML classifier. It contains numerous external links, forming a link farm, with the primary link pointing to 'http://princess-crown.lucky1st.com/uploads/1/3/0/4/130483275/130483275.html#que+es+la+mnemotecnia+ejemplos'. The document body text is heavily obfuscated and appears to be a lure, likely related to search engine optimization or content farming, directing users to a network of other PDF files.

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://princess-crown.lucky1st.com/uploads/1/3/0/4/130483275/130483275.html#que+es+la+mnemotecnia+ejemplos
    • http://mtmotorboatin.com/uploads/1/3/0/6/130604812/058c82ad.pdf
    • http://agsportsbar.com/uploads/1/3/0/4/130483592/fexidi_mevuji_zufituzopixoluf.pdf
    • http://drugtestscreening.net/uploads/1/3/0/4/130435701/faxal.pdf
    • http://tourdetrykes.com/uploads/1/3/1/3/131398020/1712291.pdf
    • http://redsnail.com/uploads/1/3/0/6/130604141/vogikinofonukile.pdf
    • http://upperfallsrealestate.com/uploads/1/3/0/5/130589312/343065.pdf
    • http://kakeibo.eu/uploads/1/3/0/7/130776617/9085264.pdf
    • http://mastersonmovement.com/uploads/1/3/0/5/130543320/312716.pdf
    • http://stefanewers.com/uploads/1/3/1/0/131070332/dapet.pdf
    • http://smartkidsearlylearningacademy.com/uploads/1/3/0/8/130874376/f9d2d5bc.pdf
    • http://dmedansky.com/uploads/1/3/0/6/130603865/c2f29a05d3.pdf
    • http://multigate.org/uploads/1/3/0/2/130291415/bawojududigarika.pdf
    • http://independenteyesrc.com/uploads/1/3/0/4/130476669/cf3266b9de7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c5a.bin
8e012bf4cd972d9a21be00c5a93d31bd3f1fefa1180e259927ef1af63037d1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 10588 bytes
font_01_sfnt_off0000b1b9.bin
fc94f08893dacdeb6e46fd93da15332dffc307b4d210fd639da955097678cca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B9 2768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.