Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d1ce1aa0ebc612…

MALICIOUS

PDF

42.8 KB Created: 2020-03-27 03:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b4226b26cfaf9a972b77382cdcd5229 SHA-1: 5277f85d26d97b4fcb1eef812858f473e6c3e33c SHA-256: c2d1ce1aa0ebc61230ff72237758d09668d34b4ead197ca57992d2d51e79c3d8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a link farm or SEO spam, containing a large number of external links to other PDF documents hosted on various domains. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. The embedded URLs suggest a potential distribution or redirection mechanism, aiming to drive traffic to these external resources.

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://artemis-me.com/uploads/1/3/1/1/131164132/131164132.html#codigos+modales+y+no+modales+cnc
    • http://puravidafarm.org/uploads/1/3/0/5/130550703/tenetaveroxili.pdf
    • http://sonyakrakoff.com/uploads/1/3/0/5/130589160/rulexulenitepugoxu.pdf
    • http://www.sakilelyles.com/uploads/1/3/0/9/130969458/6dbf650bbe229.pdf
    • http://giftshopgifts.com/uploads/1/3/0/8/130873833/wupok.pdf
    • http://cop-al.com/uploads/1/3/0/7/130739393/rixerigur_kukal_fujejebamuraxez.pdf
    • http://freethought.com/uploads/1/3/0/6/130604789/0d55a6f2e23b7.pdf
    • http://palettepopupart.com/uploads/1/3/0/2/130288986/7cf946566cc999.pdf
    • http://mysouthshorecharteracademy.com/uploads/1/3/0/4/130488833/9292145.pdf
    • http://verticaligirl.com/uploads/1/3/0/2/130272850/8737378.pdf
    • http://pittsburghboychoir.com/uploads/1/3/0/7/130739147/bd103fffe4.pdf
    • http://jacsmacdl.net/uploads/1/3/0/6/130639377/vumiguninabube.pdf
    • http://lebonregistre.com/uploads/1/3/0/7/130739811/3548528.pdf
    • http://rwbickfordconstruction.com/uploads/1/3/0/6/130621180/kuxomuvimir.pdf
    • http://www.lifeinthegreens.com/uploads/1/3/0/5/130590420/3019001.pdf
    • http://doggybackseatplatforms.com/uploads/1/3/0/2/130287456/mobebebawa.pdf
    • http://www.iwallpaperexperts.com/uploads/1/3/0/7/130738823/fd219c41.pdf
    • http://initsplacepdx.com/uploads/1/3/0/5/130543050/f515e1aa4bb4.pdf
    • http://951895316609520436.com/uploads/1/3/0/8/130874133/929568f.pdf
    • http://welovechocolate.be/uploads/1/3/0/7/130739648/9124786.pdf
    • http://cincinnatiseniorconnection.com/uploads/1/3/0/7/130776629/616439dc9fe.pdf
    • http://layoverinparistours.com/uploads/1/3/0/5/130588424/xuxov-vizaxikogufaw.pdf
    • http://deborahdion.com/uploads/1/3/0/3/130313422/nomaxulitol_xevaduv_tubakixa.pdf
    • http://luxeaam.com/uploads/1/3/0/2/130288710/45bcb.pdf
    • http://studio-ocd.com/uploads/1/3/0/7/130775295/lepavopomeged.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_off00007c04.bin
07aa0cce84ab7b6910c8059b6be22444b4759c70d24d2baa4aa26f0228b97261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 9192 bytes

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