Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e11c10b3f6d3154…

MALICIOUS

PDF

41.6 KB Created: 2020-03-12 05:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd2df080564c242ebb44e671830c4ee8 SHA-1: e4ad6053ce05f63f5058bec7f380dea28a92b87a SHA-256: 7e11c10b3f6d3154fe5ec7f65eb8db2f35d47f12408b67257a36feffc55bb3a7
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, indicative of a link farm. The primary URL, http://seafoodfestivalgiveaways.com/uploads/1/3/0/6/130620249/130620249.html#umbrella+academy+comic+vs+tv+series, suggests a lure related to popular media. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm.

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://seafoodfestivalgiveaways.com/uploads/1/3/0/6/130620249/130620249.html#umbrella+academy+comic+vs+tv+series
    • http://sciencesmartssociety.org/uploads/1/3/0/6/130604934/2f4ea0ca6.pdf
    • http://casagallegaavenidas.com/uploads/1/3/0/6/130639877/zevalaxeni-fuxuponi.pdf
    • http://startuphusle.com/uploads/1/3/0/7/130739745/timikaxivebavab_fewurovisi_vakukosimeki.pdf
    • http://nashvilledancecooperative.net/uploads/1/3/0/6/130621746/8699174.pdf
    • http://ilafayette.net/uploads/1/3/0/6/130604336/robuzerugava.pdf
    • http://www.landscapedesign360.com/uploads/1/3/1/0/131069806/125692d4dadf.pdf
    • http://scdelongsales.com/uploads/1/3/0/7/130738861/wuwata.pdf
    • http://www.kristinerinartistry.com/uploads/1/3/0/6/130620619/d6c91c6348692d4.pdf
    • http://artbyemmi.com/uploads/1/3/0/5/130551641/5701558.pdf
    • http://www.kathrynmckirahan.com/uploads/1/3/0/7/130739875/780484095.pdf
    • http://rbuels.net/uploads/1/3/0/3/130323516/1064061.pdf
    • http://hummingbirdhairstyles.com/uploads/1/3/0/6/130604690/bitebupavex.pdf
    • http://idctechcore.com/uploads/1/3/0/4/130488220/f0249104bd.pdf
    • http://www.westlakespeech.com/uploads/1/3/0/2/130272336/c9ce4969.pdf
    • http://votepolzin.com/uploads/1/3/0/4/130479389/mekufuban.pdf
    • http://ubaentertainment.com/uploads/1/3/0/4/130477090/2425495.pdf
    • http://www.ljrev.com/uploads/1/3/0/2/130289738/900023708dfc.pdf
    • http://insitesafety.com/uploads/1/3/0/5/130542922/191574.pdf
    • http://zonemaster.nihaoruinen.nl/uploads/1/3/0/9/130969682/pojoku.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_off00007a74.bin
9a26ad49eb24641bfc1aab214675748258e82acea366e62810eb8226be848ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 8056 bytes

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