Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d832a0de649437…

MALICIOUS

PDF

41.1 KB Created: 2020-03-22 14:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2887fd37bde203fab0ec4d4162cefed9 SHA-1: f6befe854e97378e435f15d8a5e65fdbd47797cf SHA-256: 67d832a0de649437d42cf019a3eee0afbea5ec81c966d5c0420972350801fe08
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are structured as SEO link farms, suggesting a malicious intent to drive traffic to potentially harmful sites. The document body, though heavily obfuscated, contains references to an audiobook and external URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious activity.

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://myentouragemusic.com/uploads/1/3/0/5/130539130/130539130.html#quivers+a+life+audiobook
    • http://multistreams.com/uploads/1/3/0/4/130475881/vajoluxon-jonitozetukorig-zibadalimejegi.pdf
    • http://letstalkinstantspanish.com/uploads/1/3/0/4/130477170/rarixuf_liwulono.pdf
    • http://vitormadeirasilva.com/uploads/1/3/0/3/130313089/6fb9e9a74aea.pdf
    • http://nadidah.net/uploads/1/3/0/7/130739886/8be888063c.pdf
    • http://www.peruknowledge.com/uploads/1/3/0/3/130323972/8043122.pdf
    • http://sysofblog.com/uploads/1/3/0/4/130488816/3850099.pdf
    • http://xlsoftfruit.com/uploads/1/3/0/5/130550836/5054174.pdf
    • http://sandosresortsrental.com/uploads/1/3/0/6/130620525/xanajesazegexima.pdf
    • http://urbanparkology.net/uploads/1/3/0/6/130621937/zekuk.pdf
    • http://conciergenursingofsocal.com/uploads/1/3/0/2/130287894/6932981.pdf
    • http://mail.violavita.net/uploads/1/3/0/4/130489358/7d9f8f13aea.pdf
    • http://egypt-events.com/uploads/1/3/0/6/130621137/rozowujetixag_mimobamu.pdf
    • http://artsywithdapaints.com/uploads/1/3/0/2/130289466/zukipodam.pdf
    • http://www.hypnocoachinggoldcoast.com/uploads/1/3/0/8/130874282/09a9e12c9690c9.pdf
    • http://www.whitwest.com/uploads/1/3/0/4/130479472/sipusawugogu-vojideliru-bafubof-sopex.pdf
    • http://masturcate.com/uploads/1/3/0/6/130621244/b7bc855df539733.pdf
    • http://hometownsweetsandtreats.com/uploads/1/3/0/5/130588425/domaxuviwarex_dixekilukiladez_livudaro_wasovamufuga.pdf
    • http://knminidiggers.com/uploads/1/3/0/4/130476185/tipesanefuzogadiliwu.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_off0000753b.bin
7eaa743f7c6fe8e5a73696ba04aaf0d73bb2b105411e797cd57beb70bebaacc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 8896 bytes