Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e93aaa491b1640…

MALICIOUS

PDF

37.4 KB Created: 2020-04-11 06:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5160b00a62c099a9d8cb09ee4849f806 SHA-1: 4c8bedaa85cd9aa28f8f72d39e88169dc8dd49bd SHA-256: 10e93aaa491b164058035fc37dee8492716891333bd7d8a53857bb707bf8d0f4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs, indicating a link farm. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, and the document's structure suggests it's part of a campaign to drive traffic to these sites.

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://rescuedada.net/uploads/1/3/0/9/130969543/130969543.html#william+w+johnstone+new+releases
    • http://stephaniezaletel.com/uploads/1/3/1/4/131406649/64785.pdf
    • http://lowerhomefees.com/uploads/1/3/0/6/130620480/sokupotusizos.pdf
    • http://pressurewashinghendersonville.com/uploads/1/3/0/7/130740054/3850520.pdf
    • http://panapsacc.org/uploads/1/3/0/5/130551279/175373.pdf
    • http://deebynum.com/uploads/1/3/0/3/130313015/5219239.pdf
    • http://ofertasmedellin.com/uploads/1/3/0/5/130590413/3607712.pdf
    • http://shelbeyhidman.com/uploads/1/3/1/3/131384432/buwaxo.pdf
    • http://4movements.org/uploads/1/3/0/7/130739369/vigekunidosa.pdf
    • http://g2h2stpete.com/uploads/1/3/0/5/130547150/8429051.pdf
    • http://trendz-lovers.com/uploads/1/3/0/4/130476204/jefumitejukuri.pdf
    • http://themillionairehair.com/uploads/1/3/0/8/130813592/318511c4.pdf
    • http://stitchthis.net/uploads/1/3/1/3/131379510/waroxirosopuze.pdf
    • http://goldentimesholiday.com/uploads/1/3/0/5/130544385/gedijegux_guviv_bosukifilenirow_darop.pdf
    • http://sheenacaesar.com/uploads/1/3/0/6/130605292/3f4178f9.pdf
    • http://tcsonline.net/uploads/1/3/0/6/130639573/segibemivebokodoxit.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_off00006a39.bin
9fdaf459e232d2579eed5bdf0cb8ce676580d44526d95958c8845c3e1a81ba2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 8056 bytes

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