Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cec67e53d0e185…

MALICIOUS

PDF

54.7 KB Created: 2020-04-09 03:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d3e58cd2e18154aa0d42e5f53453361 SHA-1: 03b796eb7608aa52b6a91e87a559cc229b6f050b SHA-256: 03cec67e53d0e1853632288c07f45bcf60f95aa745cedc862ab03c4f95b92967
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or SEO manipulation tactic, likely intended to distribute malicious content or engage in phishing. The ML classifier strongly supports the malicious nature of this PDF.

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://bloomincactus.com/uploads/1/3/0/7/130776212/130776212.html#how+to+draw+barf+and+belch+from+how+to+train+your+dragon+easy
    • http://mydebtreliefteam.com/uploads/1/3/0/4/130435574/6609344.pdf
    • http://jrsmortgages.com/uploads/1/3/1/3/131379401/fegaregalijemop.pdf
    • http://barryglanville.com/uploads/1/3/0/2/130273842/jesevuze.pdf
    • http://contemporarymusicproject.org/uploads/1/3/0/9/130969445/sukajezagezuxama.pdf
    • http://helpandresolutioncenter.com/uploads/1/3/0/6/130639358/sivajaxasapavi_sesuvogo_bulowemikonez_xofunafoveg.pdf
    • http://luckycloverwedding.com/uploads/1/3/0/8/130814407/lapivotedozi.pdf
    • http://simplycapturedbymm.com/uploads/1/3/0/2/130272356/7447927.pdf
    • http://splice.online/uploads/1/3/0/3/130379063/2374443.pdf
    • http://rsbdevelopment.com/uploads/1/3/0/4/130488299/zukuvepexovad.pdf
    • http://palominofarm.com/uploads/1/3/0/6/130639763/siwotuvesaxawo-molegakuvirupo-rajoruxadusu-nolesafotodap.pdf
    • http://brunswickmovers.net/uploads/1/3/0/8/130873828/95d5b218780125a.pdf
    • http://lanerealestateservices.com/uploads/1/3/1/4/131408928/4105398.pdf
    • http://pedals-n-pearls.com/uploads/1/3/0/6/130604702/8833784.pdf
    • http://tipsforartists.com/uploads/1/3/0/3/130323929/wasira_vodeparim_dokarumopiw.pdf
    • http://needlot.net/uploads/1/3/0/6/130639504/6023576.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_off0000adf8.bin
ea88fc419090ffcbccc79bc2d2c4d59aa0678fa23c4bd206266ee45e0d2bf822		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF8 7860 bytes

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