Malicious PDF — malware analysis report

Static analysis result for SHA-256 703301c1ffbf8478…

MALICIOUS

PDF

48.4 KB Created: 2020-04-23 02:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30c06b149c996ba76f6c105cfebdd9cb SHA-1: edc687b5b2f6a4428f9ec8079fe5d8678dd6daba SHA-256: 703301c1ffbf8478ce06cf4aef7811eedbb14a105dd410e733d1b2cd1e76a448
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or SEO manipulation scheme. The document body contains garbled text and what appears to be embedded URLs, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the sheer volume of external links points to a malicious intent to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://schuhhaus-matzenauer.at/uploads/1/3/0/5/130546290/130546290.html#bsc+information+technology+education+uew
    • http://legacypattern.com/uploads/1/3/0/2/130274322/vokuviwam.pdf
    • http://dhhslaragelles.com/uploads/1/3/0/6/130621307/5202677.pdf
    • http://wil2win.net/uploads/1/3/0/7/130775471/pewadakizetir.pdf
    • http://allwaystowingtx.com/uploads/1/3/0/3/130379412/muravofiwafe_disawanubab.pdf
    • http://broome-enterprises.com/uploads/1/3/0/4/130483842/de0c50e.pdf
    • http://longislandsidingpros.com/uploads/1/3/1/4/131483219/nafabajij-fozojop-zimak-kegot.pdf
    • http://sunsetfuneralsupply.com/uploads/1/3/0/2/130289581/9352719.pdf
    • http://keepmusicrockin.com/uploads/1/3/1/3/131398131/f48e7.pdf
    • http://hospitalityguru.com/uploads/1/3/0/4/130488509/fuvupo_bosopam_ligeze_bupulakajuxi.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_off0000952c.bin
4dd7e69cb2ad63127d44f7e5bd0bd9f9687fd106333372ffe252dc5b12015048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952C 8444 bytes

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