Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cea98f4ef7fd98e…

MALICIOUS

PDF

39.3 KB Created: 2020-03-22 13:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 10b617ec42fd3b845bc2451e3a58f10d SHA-1: 12d08bd7a602d8555803cdcf6b466bbb6f62d4c3 SHA-256: 7cea98f4ef7fd98e215b2e0145f36db4861ba7fad6be809859c4e2e0e23ac0f8
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as http://laurabotzongyoga.com/uploads/1/3/0/7/130776594/130776594.html#divine+mercy+diary+audio, are likely part of this redirection scheme, aiming to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9284729-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9284729-0
  • 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://laurabotzongyoga.com/uploads/1/3/0/7/130776594/130776594.html#divine+mercy+diary+audio
    • http://stephaniemarrazzo.com/uploads/1/3/0/7/130740464/widixapebo_biwaju_rejisa_petewifigeluwu.pdf
    • http://cruisingmoriarty.com/uploads/1/3/0/4/130476172/3702258.pdf
    • http://kgboutiquedesigns.com/uploads/1/3/1/0/131071063/woxodamunuwi.pdf
    • http://drdom.com.au/uploads/1/3/0/4/130490056/8761904.pdf
    • http://webdisk.curriculumconsults.com/uploads/1/3/0/4/130476342/5465806.pdf
    • http://www.leaseoptioninvesting.net/uploads/1/3/0/6/130639121/lesato.pdf
    • http://myurbanhermit.com/uploads/1/3/0/7/130775115/2825699.pdf
    • http://marketdragon.net/uploads/1/3/0/7/130740054/4939959.pdf
    • http://ns2.winsoft.com/uploads/1/3/0/4/130488301/tupojunawinevunavo.pdf
    • http://mountainandocean.org/uploads/1/3/0/8/130814562/8961855.pdf
    • http://www.kikicomm.com/uploads/1/3/0/4/130475921/livumoz_kidulamudul_vizaz.pdf
    • http://hinduebooks.org/uploads/1/3/0/8/130814633/riwazuwujuji.pdf
    • http://wrenviroservices.com/uploads/1/3/0/6/130604688/5440944.pdf
    • http://realtimeoperatingsystem.net/uploads/1/3/0/6/130603673/fuvezova-budobovew.pdf
    • http://ekincengizkan.net/uploads/1/3/0/7/130738723/tokujilibidisab.pdf
    • http://craigslisd.com/uploads/1/3/0/4/130476078/wojelekafo_somalasosodo_rerolowomagumum.pdf
    • http://datatelecom.co.uk/uploads/1/3/0/4/130483191/jotidigi-nikomizu.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_off00007021.bin
49009bd5870ca51fdfea0590681a8020407fb84348c312ccc7561bb2ce881026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7021 7828 bytes

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