Malicious PDF — malware analysis report

Static analysis result for SHA-256 919ebda0983f83bd…

MALICIOUS

PDF

53.2 KB Created: 2020-05-04 13:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17c678df11ccd56e70629ad919578e94 SHA-1: e6dae498ff34e223b416b08187d7edfba0c68ab3 SHA-256: 919ebda0983f83bd2eed19c90e00d1842cefe458f9f9485e253b4d2b6b01345f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The document body mentions 'Spotify premium apk pc', suggesting a lure to download potentially malicious software. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://nationalriskmanagementgroup.com/uploads/1/3/0/4/130489020/130489020.html#spotify+premium+apk+pc
    • http://knuckleswhiterock.com/uploads/1/3/0/6/130620372/xasab.pdf
    • http://organawellness.com/uploads/1/3/0/6/130604557/7573689.pdf
    • http://williamrjohnston.com/uploads/1/3/1/4/131410606/mitujopofaboroz_nerez_kodanuxore_zoxab.pdf
    • http://alcoholismsucks.com/uploads/1/3/1/4/131437548/9449834.pdf
    • http://emilychenmoir.com/uploads/1/3/0/8/130874300/1943278.pdf
    • http://libertyconference.org/uploads/1/3/0/4/130483194/dejupinerob.pdf
    • http://inspirationalmediasolutions.com/uploads/1/3/0/6/130604767/56d7bce667b.pdf
    • http://realty4d.com/uploads/1/3/1/3/131382366/5655814.pdf
    • http://structuresofconcern.com/uploads/1/3/0/3/130323106/8190387.pdf
    • http://redgreenplumbing.com/uploads/1/3/0/4/130479123/zizuko-jetonugewiruso-sevufud-kasotogiru.pdf
    • http://cisisposa.com/uploads/1/3/0/4/130483198/279ab2baefc.pdf
    • http://adrconstructionllc.com/uploads/1/3/0/5/130541744/wixevubuvaba_puvijanaxemizix_jejaguj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000a3f0.bin
20cc733bfe2602bc62eadbc1f44e82763a9b6a03e1b6aca540c33089a8651e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F0 11888 bytes

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