Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad002358aa0ca35…

MALICIOUS

PDF

40.0 KB Created: 2020-06-09 21:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08dc302ae1d31134180ccdcd6c5bdeaa SHA-1: 07aeb29cd86032385e62836be881eadcf524cd5f SHA-256: 4ad002358aa0ca35afc6c6b4aa898b79df859710244a006196c8dda67dec08ee
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files on different domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious attack pattern. No scripts were extracted, and the document body was largely unreadable, making the URL analysis the primary driver for this assessment.

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://mx.binksgames.com/uploads/1/3/1/8/131856200/131856200.html#ankara+%25C3%25A7ankaya+mahalle+haritas%25C4%25B1
    • http://prazdancefit.com/uploads/1/3/0/6/130603979/8239451.pdf
    • http://mrsthomasprogramme.com/uploads/1/3/1/4/131454916/9967207.pdf
    • http://simonjohns.co.uk/uploads/1/3/0/5/130539757/9790063.pdf
    • http://btmamusic.com/uploads/1/3/0/6/130605016/depelulidiluz_dobaw_sofav_bovedib.pdf
    • http://sbest.space/uploads/1/3/0/4/130483167/3dec6d95de3ef8.pdf
    • http://vatwizardsinc.com/uploads/1/3/0/6/130640070/gonuxikenisadarul.pdf
    • http://designnextdoor.net/uploads/1/3/0/7/130776509/gasexi-saguromoneda.pdf
    • http://megaestrategias.com/uploads/1/3/0/4/130483249/e1bc76897.pdf
    • http://hostmaster.igc.swiss/uploads/1/3/1/3/131384573/589421.pdf
    • http://beabeatennis.com/uploads/1/3/0/6/130604699/b1a112aba.pdf
    • http://mygourmetpantry.com.au/uploads/1/3/0/9/130968921/ca2ddfa129144.pdf
    • http://sautterfarm4.org/uploads/1/3/0/8/130813988/7382635.pdf
    • http://conversationsofchange.net/uploads/1/3/1/3/131383981/fukasenu.pdf
    • http://killerwaxxgeorgia.com/uploads/1/3/0/3/130313183/1140707.pdf
    • https://wizubuvore.files.wordpress.com/2020/06/15553595254.pdf
    • https://pamifanasote.files.wordpress.com/2020/06/wapinuta.pdf
    • https://zexifodu.files.wordpress.com/2020/06/50252307300.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_off00005f30.bin
c7329be74e7af1b99dc4cf78fd0e3a5ef45e4511d6fb223b551139cc425d046d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F30 17172 bytes

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