Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da06a0f011daa5e…

MALICIOUS

PDF

48.0 KB Created: 2020-03-13 04:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 383e0b086c954eb46ab8609e64a6cab1 SHA-1: f1847affdbd65e555ed6aae24245dd73a438e9b8 SHA-256: 9da06a0f011daa5e421e79ca7a120e28e225ae5b0180677e101426a5f31ea61e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent and by an ML classifier as malicious. It contains a large number of external links, many of which point to other PDF files on different domains. This suggests a link farm or SEO manipulation tactic, potentially to distribute malware or engage in phishing. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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-9019418-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9019418-0
  • 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://i9sollarenergy.com/uploads/1/3/0/6/130621819/130621819.html#anchoring+script+for+cultural+event%2Fannual+function+part+2
    • http://marsjoy.com/uploads/1/3/0/7/130739162/nawevibaxepube.pdf
    • http://progenealogicalservices.com/uploads/1/3/1/0/131070213/zikubaxejokesade.pdf
    • http://truedefdl.com/uploads/1/3/0/2/130288317/4217729.pdf
    • http://www.maiawalton2d.com/uploads/1/3/0/3/130379462/8731e4d0940f827.pdf
    • http://webdisk.samanthasprings.com/uploads/1/3/0/9/130969500/9125483.pdf
    • http://drexelmusic.com/uploads/1/3/0/9/130969891/wilosoda.pdf
    • http://figgyandjiggydesigns.com/uploads/1/3/0/6/130620669/f2a07d4a8c5c.pdf
    • http://dallascbdsource.com/uploads/1/3/0/5/130539810/7fbe20525014.pdf
    • http://www.positiviteeshirts.net/uploads/1/3/0/7/130776720/8755365.pdf
    • http://museconstruction.net/uploads/1/3/0/5/130589220/gurogubeniterujem.pdf
    • http://www.justuschildrenbooks.com/uploads/1/3/1/0/131071290/vadazij.pdf
    • http://www.ready4harvestglobal.org/uploads/1/3/0/6/130604693/mukevubizolup_sixijud_sepalo_dopiwito.pdf
    • http://mx.mycloset.info/uploads/1/3/0/5/130589410/suzono_bugikoxojef.pdf
    • http://urbanetribe.com/uploads/1/3/0/2/130289448/b5e574e33dc47be.pdf
    • http://alyssaoeder.com/uploads/1/3/0/2/130288381/gavamukitedesix.pdf
    • http://moneysprout.net/uploads/1/3/0/7/130775085/voterugub.pdf
    • http://bcn-fashionhouse.com/uploads/1/3/0/6/130603994/4b8db.pdf
    • http://mx.kim-bella.com/uploads/1/3/0/3/130323703/feladajixa_fikowesa_bamusat_dufujili.pdf
    • http://www.cityspeechservices.com/uploads/1/3/0/5/130590058/vemipive-nizezolitog-nawinososav.pdf
    • http://www.nyamutpeterpal.com/uploads/1/3/0/2/130288580/niwajop_ragofu_tenogenivuxegu_wejewakujeburug.pdf
    • http://www.liftmoehr.com/uploads/1/3/0/7/130775284/1259045.pdf
    • http://emmaleedesigns.com/uploads/1/3/0/7/130738921/39b33.pdf
    • http://ilafayette.net/uploads/1/3/0/4/130490776/bonumozivuxokobexa.pdf
    • http://incrediblegenius.net/uploads/1/3/0/6/130639026/disogajibisuduv.pdf
    • http://prestineepoxycoatings.com/uploads/1/3/0/2/130287407/29d0d841e00c6d.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_off000090ec.bin
11830be7402543db370f3e7079a240b133f20c667c1beaedab10fdfe17fe3ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EC 8096 bytes

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