Malicious PDF — malware analysis report

Static analysis result for SHA-256 176fd6ca5efaad90…

MALICIOUS

PDF

48.6 KB Created: 2020-04-12 05:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 247714ca6ca829948534136e96d32e6f SHA-1: df4421bae32201d270be9280fb5e0a1ea6c6c486 SHA-256: 176fd6ca5efaad90a458d2819082295af1a9218cae62d7c3085f7b437e880c92
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 are structured as SEO link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'Modelo mecano cuantico octavo basico' and authoring application details, suggesting a lure document.

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://dancinggoatsanctuary.com/uploads/1/3/0/4/130477040/130477040.html#modelo+mecano+cuantico+octavo+basico
    • http://simplymagicaljewelry.com/uploads/1/3/0/8/130874536/5640635.pdf
    • http://agrodharma.com/uploads/1/3/0/6/130620280/pifala.pdf
    • http://jfitkinda.com/uploads/1/3/1/4/131438685/kesiridokup-tatulixufejevog-kisuwimogavejoj-pulenarev.pdf
    • http://bellestarrproductions.com/uploads/1/3/0/6/130639444/2209963.pdf
    • http://l00k-at-me.com/uploads/1/3/1/6/131636655/busozonizoxutu-wuwilarejamapol-zuzubajaval.pdf
    • http://phoenixzinefest.com/uploads/1/3/1/3/131380953/6e2335f2aa8.pdf
    • http://stemmbus.com/uploads/1/3/0/7/130776827/delidifidizezadak.pdf
    • http://nicevirginhair.net/uploads/1/3/0/5/130539657/fubadasoguxemidamew.pdf
    • http://enrichmusic.studio/uploads/1/3/0/5/130550732/e1871cd3589e6e3.pdf
    • http://ccleboeuf.com/uploads/1/3/0/5/130547450/vusovo.pdf
    • http://lxgtechnologies.net/uploads/1/3/1/3/131384249/9965242.pdf
    • http://healingyoga.nl/uploads/1/3/0/6/130604002/fowopofimidepe_zipejoteloji_dixodekux.pdf
    • http://ephemeralbeing.com/uploads/1/3/0/7/130740340/mirobelu_pebonuguj.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_off0000888c.bin
119ae40c6caf69225ab71f4b6d3ade37eb14debcb7907f7cd24db1e39262ef76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888C 9420 bytes
font_01_sfnt_off0000aa16.bin
74a6476bc50c415754eef6ec38e0edcbfbb2dcc724705042afdb8d52e82c36fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA16 2824 bytes

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